释义 |
up to DOINGprep infmldoing (something which might be bad or illegal), often secretly忙于…,密谋的What's he up to with all those crates in his garage?在车库放那么多木条箱他要干什么?She's up to no good/up to something--you can always tell because she stays in her room.她干不出好事----你总能看出来,因为她老呆在房间里。
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