那个男孩没有说谢谢就离开了,真是没礼貌。

It was rude of the boy to leave without saying thank you.

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It was rude of the boy to leave without saying thank you.

rude 是形容词,意思是"粗鲁的、无礼的",描述缺乏礼貌或考虑他人感受的行为。

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