较小行星的波振幅不大，因此科学家只能在它们围绕恒星运行数次后才能从噪音中收集到讯号。
Small planets' waves have small amplitudes, so you can pick the signal from the noise only after several orbits.
在你吃饱10到20分钟之后，你的大脑才能接收到胃发出的讯号。
It takes 10 to 20 minutes for your brain to get the message from your stomach that you've had enough to eat.
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