Definition
to reduce the quantity or usage of something
降低；减少；削减
In order to improve his health, he decided to cut down on smoking.
为了改善健康，他决定减少抽烟。
The company plans to cut down on expenses to cope with the economic crisis.
公司计划削减开支以应对经济危机。
To help the environment, we should cut down on the use of plastic.
为了帮助环境，我们应该减少使用塑料。