In this video by QuantumBoffin, an experiment demonstrates the total internal reflection of light inside a glass block. An angular scale is used to measure the critical angle and determine the refractive index of the glass [full video: ] , page 277

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一位在北京的中学老师，在海外彻底火了

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生活中的暗示，你知道多少？

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抖音200万博主张根源，租了4台机器人，想测评在现实生活中机器人的表现。结果个个跟机器残疾人一样，这就是国产机器人真实现状。大家看到类似春晚的牛逼动作，都是按特定环境编程的结果。

价值1800块的大马士革钢板做了把铲子，结果亮了！无法形容的帅、美！

陈慧琳遇到疯狂男粉丝，强行闯进电梯间求合影😂

比较罕见的场面。乌克兰自杀式无人机击落俄军Ka-52直升机镜头。（飞机坠毁后，两名俄军机组人员也被后续无人机消灭）

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终于听清了！太震撼🫨 当年马云和柳传志这段虎狼之词这版声音是最清晰的！马云说他中毒，还差点挂了这是怎么回事儿 😂😂

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3月21日，一名博主自导自演的视频，讽刺国内所谓的“大国工匠”和“造神运动” 视频最后他感慨：这里到底还有什么是真的

The J20 is an ex Soviet design, the MiG 1.44. The whole idea is to develop a very high profile and visible “stealth” aircraft. In the end, it became a white elephant for graft with bad engines and are able to be detected by the drying rack of a radar.

没有想到，秦海璐居然也要相亲被气坏了：老娘要你管？😂

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创维集团老总黄宏生，花了整整十个亿，才戒掉的五个字，值得大家细细品味！

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In this video by QuantumBoffin, an experiment demonstrates the total internal reflection of light inside a glass block. An angular scale is used to measure the critical angle and determine the refractive index of the glass

[full video: ]
有趣
( buff.ly )

2年前由 Massimo 提交

1周内 1个月内 1年内全部时间

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An anti-Russian activist protested against Viktor Orbán’s meeting with Putin by leaving some gifts at the PM’s office in Budapest. “Comrade PM deserves a dog bone as a reward because he obeys Putin as a vassal, who, after the Soviet Union, took away Hungary's independence again.”
时政
( twitter.com)

2年前 • Szabolcs Panyi 0 评论

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Neerja Bhanot was a 22-year-old flight attendant working on Pan Am Flight 73 when it was hijacked by terrorists during a layover in 1986.

Soon after taking control, the terrorists killed an Indian-American traveler and discarded his body outside the plane.

They ordered…
时政
( twitter.com)

2年前 • Fascinating 0 评论

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Kathrine Switzer, the first woman to run the Boston Marathon, is harassed by officials as women were not allowed to participate, 1967

Kathrine Switzer made sports history as the first woman to run the Boston Marathon in 1967. At the time, women were not allowed to participate,…
时政
( twitter.com)

2年前 • Fascinating 0 评论

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Introducing Languine: Translate your app with a CLI powered by AI SDK.
🔍 Detects changes in translation keys via Git diff
🎨 Ensures consistent tone and style
🔓 100% open source and free
🌐 Works with all major i18n libraries
Link and some background ⬇️🧵
时政
( twitter.com)

1年前 • Pontus Abrahamsson — oss/acc • 下载视频 0 评论

00:00:16

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The Azerbaijani pilots lost all hydraulics and tried to steer with engine thrust only after having been hit by a Russian missile and forced to cross the Caspian Sea after being denied emergency landing in Russia.
They saved 29 lives while losing their own.
Absolute heroes.
时政
( twitter.com)

1年前 • Visegrád 24 0 评论

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Azerbaijani pilot Aleksandr Kalyaninov died as a hero while saving dozens of lives.
The passenger plane was very difficult to control after it was struck by a Russian missile near Grozny.
He made it across the Caspian Sea after having been refused an emergency landing in Russia
时政
( twitter.com)

1年前 • Visegrád 24 0 评论

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When they say they want to take your property, believe them. Listen to our President:
“….Reparations, we are actively going to participate in that, because we do believe that the legacies of slavery and apartheid, do needs to be addressed by our own transformation process. When
btc
( twitter.com)

1年前 • Boer • 下载视频 0 评论

00:02:44

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“Grok is a word from a Heinlein novel, Stranger in a Strange Land. It's used by a guy who's raised on Mars.
The word ‘grok’ is to fully and profoundly understand something. That's what the word ‘grok’ means to Fully and profoundly understand something.”
-Elon Musk
btc
( twitter.com)

1年前 • SMX 🇺🇸 • 下载视频 0 评论

00:00:23

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🇺🇸 USS GERALD R. FORD
- Lead aircraft carrier of its class and the biggest warship ever built.
- Cost of $13 billion, making it the most expensive warship in history.
- Length of 1,092 ft (333 m) and displacement of 100,000 tonnes.
- Powered by two nuclear reactors, with
时政
( twitter.com)

1年前 • The Spectator Index 0 评论

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Breaking: Donald Trump signed a “PUTTING PEOPLE OVER FISH” directive to restart his efforts from
his first administration to move water from Northern California further south in the state. The effort was stopped by Gov. Newsom at the time because of a fish species that is at
btc
( twitter.com)

1年前 • Andy Ngo 0 评论

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ELON: TESLA IS UNIQUELY POSITIONED TO MANUFACTURE A HUMANOID ROBOT
“We really have by far the best team of humanoid robotics engineers in the world.
We also have all the other ingredients necessary.
You need a great battery pack, you need great power electronics, you need a
btc
( twitter.com)

1年前 • Mario Nawfal • 下载视频 0 评论

00:00:44

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President Trump just said that Elon Musk is doing a fantastic job and every single thing that he has looked at has been corrupt or illegitimate. He just said that we’re on our way to a balanced budget just by eradicating all the fraud in the government.
btc
( twitter.com)

1年前 • Insurrection Barbie 0 评论

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🇮🇹 Italian PM Giorgia Meloni:
“The Left predicted that I would destroy Italy, but they were wrong. Employment is at a Record High, our Economy is Growing, Illegal Immigration has decreased by 60%, and we are expanding freedom in every aspect of Italians’ lives.”
🔥🔥🔥
btc
( twitter.com)

1年前 • Cillian • 下载视频 0 评论

00:00:50

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RFK Jr. says Elon Musk & DOGE are now inside the Department of HHS, exposing & eliminating massive fraud.
"We've identified extraordinary waste in my department and HHS. The expenditures, and the budget of HHS during the Biden administration went up by 38%, the employees went up
btc
( twitter.com)

1年前 • George • 下载视频 0 评论

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🚨 ELON MUSK: "You can tell which side is the good side and which side is the bad side by which side wishes to restrict freedom of speech.
In pushing for censorship, it makes it very clear that the left is the side that is against freedom."
btc
( twitter.com)

11个月前 • DogeDesigner • 下载视频 0 评论

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I believe was right when he said that Democrats were importing illegals as a means of having a permanent majority in all swing states.
However, he missed a more sinister underlying reason for doing so...
By importing twenty million illegals, they also set up an absurd
btc
( twitter.com)

11个月前 • Brenden Dilley 0 评论

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🚨OPENAI ACCUSED OF ABANDONING ITS MISSION—COALITION DEMANDS HALT TO RESTRUCTURE
A coalition of former insiders and AI watchdogs says OpenAI is selling out humanity. In a scathing letter, they accused the company of gutting its original mission—to develop AGI for public good—by
btc
( twitter.com)

11个月前 • Mario Nawfal 0 评论

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The reason posts with links sometimes get lower reach is not because they are explicitly downranked by any evil rule or logic. It's just because posts with links get fewer engagements (e.g. likes) per view
In Twitter 1.0 days, there was a model that explicitly upranked posts
btc
( twitter.com)

11个月前 • Jay Baxter 0 评论

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The Fed's worst nightmare just got worse:
New data showed that US GDP CONTRATCTED by -0.3% in Q1 2025, while +0.3% growth was expected.
To make things worse, the GDP Price Index surged to +3.7%, its highest since August 2023.
What does Powell do now?
(a thread)
时政
( twitter.com)

10个月前 • The Kobeissi Letter 0 评论

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🚨BREAKING: Neuralink’s first patient in the UK, Paul, who is paralyzed by motor neuron disease, has received a brain implant.
Just hours after surgery, he was able to control a computer with his thoughts and is now using it to play games and regain independence.
btc
( twitter.com)

4个月前 • DogeDesigner • 下载视频 0 评论

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S&P 500
Is the market overvalued or in a bubble? Contrary to consensus - no.
If analysts are correct and margins expand to 15.5% by 2027 (+180 bps), then multiples remain more likely to expand than contract.
Less cyclical index composition + higher margins = rising multiples.
时政
( twitter.com)

4个月前 • Warren Pies 0 评论

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The far left has basically destroyed the bite and power of some of the harshest words in the English language.
By calling everyone they hate a racist, the word “racist” has essentially become meaningless. Anyone with half a brain just shrugs off the accusation and carries on
btc
( twitter.com)

5个月前 • Jason DeBolt ⚡️ 0 评论

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Population in 2100, as projected by UN Population Division.
🇮🇳 India: 1,533 million
🇨🇳 China: 771 million
🇳🇬 Nigeria: 546 million
🇵🇰 Pakistan: 487 million
🇨🇩 Congo: 431 million
🇺🇸 US: 394 million
🇪🇹 Ethiopia: 323 million
🇮🇩 Indonesia: 297 million
🇹🇿 Tanzania: 244 million
🇪🇬
时政
( twitter.com)

4个月前 • The Spectator Index 0 评论

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Imagine the thing you choose to critique Elon Musk on is work ethic 😂
Elon Musk:
• Works 80–120 hours per week during peak periods
• Jobs created (direct + supply chain): ~600,000
• Salaries paid out by his companies: ~$110 billion
• Taxes he paid in just 2021: $11 billion
btc
( twitter.com)

4个月前 • Sawyer Merritt 0 评论

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We are devastated to confirm the death of our own, Spc. Sarah Beckstrom, who was shot in the line of duty near the Farragut Square Metro Station Wednesday. Spc. Beckstrom was pronounced dead at MedStar Washington Hospital on Nov. 27, by wounds incurred during the shooting.
时政
( twitter.com)

3个月前 • WV National Guard 0 评论