Definition
to reduce the quantity or usage of something
降低；減少；削減
In order to improve his health, he decided to cut down on smoking.
為了改善健康，他決定減少抽煙。
The company plans to cut down on expenses to cope with the economic crisis.
公司計劃削減開支以應對經濟危機。
To help the environment, we should cut down on the use of plastic.
為了幫助環境，我們應該減少使用塑膠。