1.
N-COUNT
试用;试验 If you give something a tryout, you try it or test it to see how useful it is.
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The recycling scheme gets its first try-out in rural Dorset.
这些再循环方案在多塞特郡的农村地区首先试用。
2.
N-COUNT
(争取入队资格的)角逐赛，选拔赛;(争取角色的)试演 If you are given a tryout for a sports team or an acting role, you compete or you perform a test in an attempt to be chosen.
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…tryouts for the U.S. junior national athletics team.
入选美国国家少年体育队的选拔赛
