his expression changed
他的表情变了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
His expression changed from amazement to joy.
他的表情由惊变喜。
《牛津词典》
His expression changed from surprise to one of amusement.
他的神情由惊变喜。
The expression on his face never changed.
他的面部表情总是一成不变。
His beatific, unfocussed expression abruptly changed when he noticed me sitting on the floor.
NEWYORKER: Sweetheart Sorrow
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