Elementary unit

elementary [,ɛlɪ'mɛntri]

adj. 基本的;初级的;[化]元素的;初等;

elem元素，要素+ent表示物+ary...的 →基本的

unit ['ju:nit]

n. 单位，单元;装置;个体;[数]单位数;

Western countries have evry strict visa requirements.

在西方国家有严格的签证要求。

Whatever he does, don't say a word.

不管他做什么，你都不要讲话。

when they would be capable of providing information about traffic jams and suggesting alternative routes, when they would be used in hospitals to help doctors to diagnose illnesses, when they would relieve office workers and accountants of dull, repetitiv

计算机可以使办公室人员和会计免除那些枯燥、重复的劳动。