Many drugs were found by trial and error 很多药物都是通过反复试验才发现的。 We plan to release a prototype this autumn for trial in hospitals. 我们计划今年秋天在各医院推出一个模型进行试验。 The system was introduced on a trial basis for one month. 这个制度已引进试行一个月。 The date of the trial has been advanced by one week. 审判日期提前了一星期。 The trial is expected to continue for three months. 预计审判要持续三个月。 上一篇：while表转折的例句 下一篇：time是不是可数名词? |