In a small space, this lets your ears catch a lot of those song vibration.

在一个小空间里，这就会让你的耳朵听到许多声音的振动。

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After Russia launched the first space satellite, other countries had to play catch-up.

俄国发射了第一颗人造卫星以后，其它国家都尽力追赶。

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After Russia launched the first space satellite, other countries had to play catch-up.

俄国发射了第一颗人造卫星以后，其它国家都尽力追赶。

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