An untrained horse had taken fright at the sound of gunfire.一匹未经训练的马听到枪响受了惊。Our Intelligence Service was untrained, cumbersome, and almost wholly ineffectual.我们的情报部门人员缺乏训练，机构臃肿，简直毫无用处。To the untrained eye, the children w...
The pill is the most efficient method of birth control.服用避孕药是最有效的避孕方法。She had been on the pill for three years.她吃口服避孕药已有3年。It was at that time she started taking the contraceptive pill.她就是从那个时候开始服用避孕药的。...