你肯定算错了。
3 used to describe a situation where there are problems, or when someone is ill or unhappy 〔状况〕有问题的; 〔身体〕有毛病的; 〔人〕情绪不佳的
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15 15. to understand a situation in completely the wrong way [英,非正式]
完全误解形势 BrE informal
get the wrong end of the stick