don't look a gift horse in the m

don't look a gift horse in the mouth 字面意思是“赠马不看牙”，可以意为“不屑一顾，嗤之以鼻，忘恩负义”等，寓意：

don't be ungrateful when you receive a gift

收到礼物时不要忘恩负义

do not be critical of a gift you receive

不要批评你收到的礼物

do not refuse something good that is offered

不要拒绝别人提供的好东西

do not be unappreciative of or question a gift you have received

不要对你收到的礼物不屑一顾或质疑

例如：

I know you don't like the dress very much, but it was a gift; you should not look a gift horse in the mouth.

我知道你不太喜欢这件衣服，但那是一件礼物，你不应该对礼物嗤之以鼻。

Don't look a gift horse in the mouth, be grateful for what you have received.

不要忘恩负义，要对你收到的东西心存感激。

He gave me his old car as a gift; I know its not a great one, but I wouldn't look a gift horse in the mouth.

他给我旧的汽车当做礼物，我知道那辆车不怎么样，但我不会嗤之以鼻。

It's not what you were hoping for, but it's the best he could afford; I would advise you not to look a gift horse in the mouth.

这不是你所希望的，但这是他能负担得起的最好的；我劝你不要不屑一顾。

解析：advise sb not to do sth 表示建议或是劝告某人不要做某事。

If I were you, I wouldn't look a gift horse in the mouth. Just be grateful that he was kind enough to give you his old watch when you needed one.

如果我是你，我就不会不屑一顾。他在你需要的时候把他的旧表给你，你要心存感激。

解析：此句是 be 动词的虚拟语气，表示不真实的或是说话人渴望的事。

千里送鹅毛，礼轻情意重，友谊的好坏是不跟礼物的贵重成正比，真正的友谊天长地久，靠礼物维持的友谊缺斤少两。