tester
noun [ C ] uk/ˈtes.tər/ us/ˈtes.tɚ/
测试员；试验员；测试器，测试仪
a person or a machine that tests something
小包装试用品，试用装
a small container of a product that you can try in order to see if you like it
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。