necessary

• 必要设备

  necessary equipment

• 必要措施

  necessary measure

• 十分必要

  utmost necessity

• 无此必要

  there is no need for this

• 有讨论的必要。

  There is a need for discussion.

• 完全不必要

  completely unnecessary

• 不必要的开支

  unnecessary expenditure

• 说不必要的话

  make needless remarks