trial可數嗎

Many drugs were found by trial and error

很多藥物都是通過反覆試驗才發現的。

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。