there's no such thing as a free lunch
said to emphasize that you cannot get something for nothing
天下沒有免費的午餐
A: I get to travel with my job but the downside is I have to give talks.
我這份工作可以經常去四處(chù)走走，不過壞處(chù)是我得經常作報(bào)告。
B: Well, there's no such thing as a free lunch.
哎呀，天下沒(méi)有免費(fèi)的午餐嘛。
A: This advertisement says I can get an expensive camera for free!
這個(gè)廣告說我可以免費(fèi)得到一台昂貴的相機!
B: Don't be so gullible. There's no such thing as a free lunch.
别那麽容易上當(dāng)。天下沒有免費(fèi)的午餐。
