like water off a duck's back 毫无意义，不起作用，毫无影响

鸭子身上的毛就像雨衣一样，水在上面待不住，一下全滑掉了。因此，

like water off a duck's back指的就是某件事毫无意义，不起作用。like有时可省略。

例句：

I can't tell my son what to do; it's water off a duck's back with him.

我无法告诉我儿子该做什么，他根本听不进去。《牛津高阶英汉双解词典》

Terry said he was too sensitive about criticism and he wanted to be like one of those people for whom it's like water off a duck's back.

特里说，他对批评太敏感了，他想成为一个可以把这些话语当作耳旁风的人。

The teacher kept telling the kids not to bang doors but it was like water off a duck's back.

老师再三告诫孩子们不要把门关得砰砰响，但老师的话对他们来说如同耳旁风。

The teacher keeps telling his students that they should study hard, but it’s like water off a duck’s back.老师一直告诉他的学生要努力学习，但丝毫不起作用。

I keep telling my friend it's foolish to invest all of her money, but it's like water off of a duck's back.

我一直告诉我的朋友，不要那么傻把所有的工资都用在投资上。可是，我的话对他全然不起作用。

I keep telling my friend it's foolish to gamble all of his money, but it's like water off a duck's back.

我一直告诉我的朋友，不要那么傻，把所有的工资都用在赌博上。可是，我的话对他全然不起作用。

I asked Amy if she got upset when journalists wrote negative things about her, and she said she didn't care what they wrote-it was like water off a duck's back.

我问艾米，当新闻工作者对她发表负面评论时，她是否会难过，她说她不在乎他们写的是什么，就像耳旁风一样。

All the criticism is water off a duck's back to me.

批评对我来说左耳进右耳出，毫无影响。《牛津高阶英汉双解词典》

His parents and teachers scolded the young boy but it was like water off a duck’s back.He continued to bahave as badly as he had done before.

这个小伙子受到父母和老师的责备，但好像耳旁风一样毫无作用，他仍然像从前一样，行为恶劣。

The doctors tell us it's dangerous to smoke, but such good advice rolls off some people like water off a duck's back.医生都告诉我们抽烟对身体是有害的。可是，这种合理的建议对于有些人来说就像耳边风一样，毫无作用。”

Criticism falls off her like water off a duck's back.

批评对于她而言毫无意义，不起作用。

I've told him that he's heading for trouble, but he doesn't listen - it's just water off a duck's back.我已经告诉过他会有麻烦的，可是他不听——说了也白说，根本毫无作用。

You can say an insult or criticism is like water off a duck's back if it doesn't upset you.

您可以说受到侮辱或批评，就像耳旁风一样毫无作用，使您丝毫不难过。