free lunch
US /friː lʌntʃ/
UK /friː lʌntʃ/
1.
免费的午餐, 不劳而获的东西
something that is obtained without effort or cost, often implying that such a thing is rare or nonexistent
:
•
There's no such thing as a free lunch; everything has a cost.
没有免费的午餐；一切都有代价。
•
He thought he could get rich quickly, but he soon learned there's no free lunch.
他以为自己可以很快致富，但他很快就明白没有免费的午餐。