A profit is an amount of money that you gain when you are paid more for something than it cost you to make, get, or do it. 利润
to get sth useful from a situation; to be useful to sb or give them an advantage 获益；得到好处；对…有用（或有益）
~ (from sth)
Farmers are profiting from the new legislation.
新法规使农民受益。
~ (by sth)
We tried to profit by our mistakes (= learn from them).
我们努力从错误中吸取教训。
~ sth
Many local people believe the development will profit them.
当地的许多人认为，这项开发将对他们有利。