[] the process of testing the quality or performance of a product to see if it will be effective or successful （对产品质量或性能的）测试，试验◆The new drug is undergoing early-stage clinical trials. 这种新药正在接受早期临床试验。⨁early-stage / initial / late-stage / mid-stage trials 早期／初期／晚期／中期试验⨁drug / safety trials 药物／安全性试验⨁to carry out / conduct / run / take part in / undergo trials 开展／实施／进行／参加／接受试验
[, ]the process of using a product or service, employing a person, etc. for a short period before you make a decision about it or them 试用◆You can give the service a trial before you make up your mind. 你在拿定主意之前可以试用一下服务。◆The system was introduced on a trial basis for six months. 引进这套系统有六个月试用期。◆She agreed to employ me for a trial period. 她同意试用我一段时间。◆We had the machine on trial for a week. 我们试用这台机器一周了。
[, ]a formal examination of evidence in a court by a judge and often a jury , to decide if sb accused of a crime is guilty or not 审讯；审问；审理；审判◆The former CEO is to stand trial for fraud. 前任首席执行官将因诈骗受审。⨁to await / face / go on / stand trial 等候／面临／受到／接受审判⨁to come to / go to trial 开庭审理；受审