中英释义：
原声例句
你看见他们正在干什么？
Do you see what they're doing in there?
《美丽心灵》《A Beautiful Mind》
双语例句
他们正在干什么？他们正在捡起一根棍子。
What are they doing ? They are picking up a stick.
重点词汇
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他们
they; them; theirs; these; their
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正在
in the process of; in the midst of; at the moment; in course of; in the act of; currently; presently
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干什么
what to do; what's with; what for