B2 [ C or U ] the hearing of statements and showing of objects, etc. in a law court to judge if a person is guilty of a crime or to decide a case or a legal matter审判，审理
Ten witnesses are expected to testify at the trial today.
The judge reacted angrily to the suggestion that it hadn't been a fair trial.
The terrorists were put on trial six years after the bombing.
After the trial, his family said they had lost all faith in the judicial system.
He is fighting extradition to Hong Kong to face trial on fraud charges.
C1 [ C or U ] a test, usually over a limited period of time, to discover how effective or suitable something or someone is试验；试用
Clinical trials of the new drug may take five years.
Preliminary results show that the vaccine is effective, but this has to be confirmed by further medical trials.
We've got a lawnmower on trial.
Preliminary trials show that the drug may be effective.
[ C ] a person or thing that is annoying and causes a lot of problems惹麻烦的人；令人伤脑筋的事物；考验
to test something in a formal way to discover how effective or suitable it is试验；试用