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冷却残渣; 含煤页岩
🗣️ 情景例句
If you aren't busy today, how about lunch?
如果你今天有空的话，吃一顿午饭如何？
I don't think you'll have any difficulty in pushing sales.
我认为你推销时不会有任何困难。
Somebody's knocking at the door. I'll answer it.
有人在敲门，我去开。