the business end
noun/ðə ˈbɪznəs end/
/ðə ˈbɪznəs end/
[singular]- (also the pointy end)(informal) the end of a tool or weapon that performs its main function
（工具或武器）行使主要功能的一端，起作用的一头 - You don't want to find yourself on the business end of a machete.
你不想被人砍一刀吧。
- You don't want to find yourself on the business end of a machete.
- the essential or basic part of a process or an operation
不可或缺的组成部分；重要环节 - The rigs are the business end of the oil industry.
钻塔是石油工业不可或缺的部分。
- The rigs are the business end of the oil industry.