fall(v.)
向下、落下、倒下
例句：
The snow is falling.
下雪了。
I stepped on ice and fell to the ground.
我踩到了一块冰，跌倒在地。
I fell ill in such a cold day.
我在这么冷的天病倒了。
foot the bill
付帐
例句：
You should foot the bill first, and then leave.
你应该先付帐，然后再离开。
Who is that speaking?
请问你是哪一位？（电话用语）
也可以说成：
Who is this speaking, please?
May I ask who's calling, please?
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