Many drugs were found by trial and error
很多藥物都是通過反復試驗才發現的。
We plan to release a prototype this autumn for trial in hospitals.
我們計劃今年秋天在各醫院推出一個模型進行試驗。
The system was introduced on a trial basis for one month.
這個制度已引進試行一個月。
The date of the trial has been advanced by one week.
審判日期提前了一星期。
The trial is expected to continue for three months.
預計審判要持續三個月。