看到孩子们快乐地玩耍,她忍不住露出了微笑。

She couldn't help but smile when she saw the children playing happily.

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She couldn't help but smile when she saw the children playing happily.

smile 是动词,意思是"微笑",指嘴角上扬、面部表情愉悦的动作。在这里用动词原形表示一个自发的、难以控制的表情动作。

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