👋 Start Here — What Is This Lesson About?
Today you are going to learn one single idea. It is a small idea, but once you see it, you will start noticing it everywhere — in machines, in animals, in your own body, and in your friends. 今天你只学一个想法。它很小，但一旦你看懂了，就会发现它无处不在——在机器里、动物身上、你自己的身体里，还有你的朋友身上。
Entrainment is when two things that have their own rhythm start sharing the same rhythm.
当两个各自有节奏的东西，开始共用同一个节奏，这就是 entrainment（同步／带动）。
Nobody has to be in charge. Nobody gives an order. They just have to be able to feel each other a little bit —
and then, slowly, they fall together.
不需要有人指挥，不需要有人下命令。它们只需要能稍微感觉到对方，然后就会慢慢走到一起。
You have already seen this a hundred times 你已经见过一百次了
What you will do today 今天你要做什么
闹鬼的钟：一个360年前的谜题，用一个滑块解开它。
词汇：学18个实验室词汇，每个都要大声说出来。
萤火虫：用一条极简单的规则，让64只萤火虫一起闪光。
生物钟：搞清楚你自己的身体为什么不太会看时间。
同步游戏：你们两个变成机器。不说话就赢不了。
自由对话：聊聊你自己生活中的节奏。
🕰️ The Haunted Clocks of 1665
A Dutch scientist named Christiaan Huygens was sick in bed. He had two pendulum clocks on the same wooden beam. He noticed something that scared him a little: the two clocks always ended up swinging together. He separated them. They drifted apart. He put them back. Within 30 minutes — together again. He called it "an odd kind of sympathy." 1665年，荷兰科学家惠更斯生病卧床，他把两个钟摆挂在同一根木梁上，发现它们总会摆到一起。他称之为"一种奇怪的同情"。
📚 Laboratory Vocabulary
Eighteen words. You will need them in Stage 6, so do not skip the speaking. 18个词。第6关会用到，所以不要跳过口语部分。
✨ The Firefly Problem
In Southeast Asia, thousands of fireflies sit in one tree and flash all at exactly the same moment, all night. Nobody is in charge. There is no leader. So how do they do it? 在东南亚，成千上万的萤火虫在同一棵树上整夜同时闪光。没有领导，没有指挥。它们是怎么做到的？
😴 Your Body Is A Clock (And It's Bad At Time)
Your body has its own clock inside your brain. Left completely alone in a dark cave, it runs on a 24.2 hour day — not 24. So every single day, something outside has to entrain it back into place. Those things are called zeitgebers (German for "time-givers"). 你的大脑里有一个生物钟。如果把你关进完全黑暗的洞穴，它会按24.2小时运行，而不是24小时。所以每天都需要外界的东西把它"带动"回正轨，这些东西叫"授时因子"（Zeitgeber，德语"给时间的人"）。
👏 The Two-Human Sync Machine
Now you two are the oscillators. Tap together on the beat. The machine measures how well your team locks on. Round 3 has no sound at all — the only way to win is to talk to each other. 现在你们两个就是振荡器。跟着节拍一起敲。机器会测量你们的同步程度。第3轮完全没有声音——只有互相说话才能赢。
🗣️ Talk Time — Conversation Topics
No sliders, no games. Just the two of you talking about rhythm in real life. Tap 🔊 on any question to hear it. Answer in full sentences — one word is not an answer. 没有滑块，没有游戏，只有你们两个聊真实生活中的节奏。点🔊听问题。用完整句子回答——一个词不算回答。
💬 Useful phrases — use these all through the conversation 对话中随时用
⚡ Final Challenge — The 60-Second Explain
One student explains entrainment to the other for 60 seconds without stopping, using at least five of the words below. Then swap. If you stop for more than 3 seconds, your partner says "Keep going!" 一个学生不停顿地向另一个解释"entrainment"，60秒，至少用下面5个词。然后交换。停顿超过3秒，搭档要说"Keep going!"
⚡ Built in the Sync Laboratory · ← back to all lessons