[countable] 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 [countable, uncountable] 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。 [uncountable, countable] 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 blind trial clinical trial free trial