hope against hope
抱一线希望
A:He hopes against hope that he can get married with Maggie.
A:他明知道不可能还妄想和玛吉结婚。
B:He must he bananas.
B:神经病。
A:Don't say so! Everyone knows that he loves Maggie very much.
A:别那么说他,谁都知道他太爱玛吉了。