You can't make a silk purse out of a sow's ear.

You can't make a silk purse out of a sow's ear.
You can't make a silk purse out of a sow's ear.

You can't make a silk purse out of a sow's ear.
狗嘴里吐不出象牙来.
英语谚语

您不可能从母猪的耳朵做一个丝绸钱包。
这英文直译

狗嘴里吐不出象牙来。

狗嘴里吐不出象牙来。

不要异想天开～作不可能做得到的事情～