They're just sitting there, but they are listening for something we'll see in a moment.

它们一直在那里，但是正在听着什么声音，我们等会再看。

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and that you have been paying attention by saying politely,

你一直在听着他们说的内容,然后有礼貌地说，

It sounds like 课堂 - SpeakingMax英语口语达人