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His smile died and the look in his face hardened.
他的微笑消失了，脸上的表情突然显得严峻。
《柯林斯英汉双解大词典》
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Her face hardened into an expression of hatred.
她的脸沉下来，面带恨意。
《牛津词典》
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His face hardened when talked about the battle.
在谈到那次战斗时，他的表情严峻起来。
youdao
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His face hardened when talked about the battle.
在谈到那次战斗时，他的表情严峻起来。
youdao