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眉头一皱，计上心来。
Knit the brows and a stratagem comes to mind.
《新英汉大辞典》
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眉头一皱使他的前额出现很多皱纹。
A frown creased his forehead.
youdao
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玛丽眉头一皱， 计上心来。
Mary knit her brows and got upon a good idea.
youdao
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玛丽眉头一皱， 计上心来。
Mary knit her brows and got upon a good idea.
youdao