【a lost cause】

leyla

Sheldon：I think it's a lost cause.我觉得没戏了。lost cause表示注定要失败的人或者事物（a cause with no chance of success）如：The movie 'jungle 2 jungle' was a lost cause.（《野蛮城市》这部电影肯定要失败的。） a lost cause

kobe

I think it's a lost cause.

dragon520

It's a lost cause if you don't to do.

薇生物

I don't wanna to be loser

Q先生

ok,Sheldon