1. 试车：室形爐chaimber furance | 試車trial run | 試合模trial closing

2. 试车;操作测试：trial hole 试孔 | trial run 试车;操作测试 | triangular file 三角锉

3. 试探运转：Trial Divisor 试除数 | trial run 试探运转 | trial version 试用版

4. 试运转：triac 三极管交联关 | trial run 试运转 | triangle 三角形

1. 初步试验;试行
A trial run is a first attempt at doing something to make sure you can do it properly.

noun

1. trying something to find out about it

e.g. a sample for ten days free trial
a trial of progesterone failed to relieve the pain

Synonym: trialtesttryout