like: a trial → →
in a trial phase, period ☊ 
trong một cơn thử thách ☊ There wasn't enough evidence to bring the case to court (= start a trial). ☊ court ☊
The case was settled out of court (= a decision was reached without a trial). ☊ court ☊
You can have it for a trial period (= in order to test it). ☊ period ☊