He sat frowning over a crossword puzzle.
他坐着皱着眉头在思考纵横字谜。
I saw him puzzle over an arithmetic problem.
我看见他正在苦心思索一道算术题。
She lets him puzzle over that for a moment, then claps her hands.
听了这话他糊涂了, 稍过片刻之后, 她拍了拍手。
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