同学你好，该知识点来自沪江网校《BEC商务英语中高级【四项全能实战签约班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好
trial的英文解释是the process of testing the ability, quality or performance of sb/sth, especially before you make a final decision about them 即是（对能力、质量、性能等的）试验，试用
pilot的解释是done on a small scale in order to see if sth is successful enough to do on a large scal为了小范围内做的试验以便看某事物是否成功到可以大规模运做
在这个句子中用pilot和trial都是可以的
祝学习愉快！