boys will be boys字面意思男人总归是男人，形容“本性难移”。

【例句】
He got into a fight at the bar last night, but you know, boys will be boys.
昨晚他在酒吧里打架了，但你知道，本性难移。

They came back from the camping trip covered in mud and with torn clothes, but hey, boys will be boys.
他们从露营旅行回来时满身泥巴，衣服破烂不堪，但嘿，本性难移。