test·er
noun/ˈtestə(r)/
/ˈtestər/
- a person or thing that tests something
测试员；试验员；测试器；测试仪 - testers of new software
新软件测试员
- testers of new software
- a small container of a product, such as perfume, that you can try in a shop to see if you like it
（商店里的）小包装试用品（如香水）