回答

・there is no such thing as a free lunch
・there is always a catch

「天下沒有白吃的午餐」在英語中可以用 there is no such thing as a free lunch 或 there is always a catch 等來表達。

I’m sorry, but I’ll stop. Because there is no such thing as a free lunch.
（不好意思，但我會停止。因為天下沒有白吃的午餐。）

There is always a catch. Be careful.
（每個優惠背後都有個陷阱，要小心。）

有幫助｜0