柠檬太酸了，让我的嘴巴皱了起来。
The lemon was so sour that it made my mouth ___pucker.
他尝到柠檬时噘起了嘴。
He ___puckered his lips when tasting the lemon.
柠檬的酸味让她的脸不由自主地皱了起来。
The sourness of the lemon made her face start ___puckering.
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