necessary
compulsory【导航词义:必要的】
necessary adj. 必需的,必要的
〔辨析〕普通用词,多指由客观因素决定的,是必不可少的。
〔例证〕
Water is necessary for life.
水是生命不可或缺的。
It is necessary to perform an operation on him.
必须对他实施手术。
It is not necessary to wear a business suit.
不一定要穿商务套装。
If necessary, we can always change the date of our trip.
必要的话,我们随时可以改变旅行的日期。
compulsory adj. 必须做的,规定的,义务的
〔辨析〕指由法律、上级命令等规定或强制的。
〔例证〕
compulsory circulation/education/insuranc
强制流通/义务教育/强制保险
Questions 1-6 are compulsory.
1至6题为必答题。
Is military service compulsory in your country?
你们国家实行义务兵役制吗?
Swimming is compulsory at their school.
在他们学校,游泳是必修课。
Many young men in that country tried to get away from compulsory military conscription.
那个国家的很多年轻人试图逃避强制征兵的政策。