不劳而获 is a Chinese saying that can be translated as "gain without labor". This saying comes from the Chinese concept of "福不禄不" (fú bù lù bù), which means that one should not only seek gain, but also avoid harm. This idea is rooted in the traditional Chinese belief that hard work and diligence are necessary for success, and that those who do not work hard will not be rewarded.

In English, a similar saying might be "no pain, no gain". Here are some example sentences using this phrase:

If you want to succeed in business, you have to be willing to work hard and put in the effort. There's no such thing as gain without labor.

I've been trying to lose weight, but it's hard work. I know that if I want to see results, I have to put in the effort and stick to a healthy diet and exercise routine. No pain, no gain.

My uncle always says that if something seems too good to be true, it probably is. There's no such thing as gain without labor - you have to put in the effort to get something in return.