• 关键的部分,关键部件

crucialadj.决定性的；关键的crucial incision[医] 十字切开crucial problems突出问题crucial bandaging十字绷带法crucial infection相互传染Crucial technique关键技术crucial decisions重大决定crucial component临界成分crucial experiment定式实验,决定性实验crucial assistance至关重要的帮助crucial importance至关重要

1. Some veterinarians believe that annual revaccination is an important and critical part of preventative health care.
   一些兽医指出每年的疫苗是卫生保健中一项重要且关键的部分。
2. The tantalum spinneret is a key part in chemical fibre silk spinning_machine.
   喷丝头是化纤纺织机上的关键部件。
3. Frequency synthersizer is one of the important part of the passive small type Rb frequency standard.
   频率综合器是被动式小型铷原子频标的关键部件之一。