trial 指为观察、研究某事物以区别其真伪、优劣或效果等而进行较长时间的试验或试用过程。
experiment 多指用科学方法在实验室内进行较系统的操作实验以验证、解释或说明某一理论、定理或某一观点等。
test 普通用词，含义广，指用科学方法对某物质进行测试以估价其性质或效能等。
try 普通用词，多用于口语或非正式场合，指试一试。
参考例句
1. These examinations were a great trial to me. 这些考试对我而言真是一大考验。
2. They succeeded in the experiment on the fifteenth trial . 他们在第十五次试验时获得了成功。
3. To ensure the brothers' safety, Sara allows herself to be arrested and faces trial. 为了确保兄弟的安全，萨拉让她自己被（被）拘捕和面临审讯。
英英解释
n.
1. (law) legal proceedings consisting of the judicial examination of issues by a competent tribunal
2. the act of testing something
3. (sports) a preliminary competition to determine qualifications
4. (law) the determination of a person's innocence or guilt by due process of law
5. trying something to find out about it
6. an annoying or frustrating or catastrophic event
7. the act of undergoing testing
