孩子们在他们的长辈谈话时插嘴是不礼貌的。
It is impolite for children to cut in when their seniors are talking.
父母谈正经事时，孩子插话是不礼貌的。
It is impolite of children to jump in when their parents are talking business.
要让他知道，他很快就会长成个小男子汉了，而这种行为对大孩子来说是非常不礼貌的。
Let him know he is getting to be a big boy and this is not appropriate behavior.
要让他知道，他很快就会长成个小男子汉了，而这种行为对大孩子来说是非常不礼貌的。
Let him know he is getting to be a big boy and this is not appropriate behavior.
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