unit释义：n. 单位，单元；装置；[军] 部队；部件双语例句：When all the unit tests have run? 何时运行完所有单元测试？The cavalry unit must be remounted immediately. 骑兵部队必须立即补充新马。

Third, they help you think through the interface and requirements of each unit. 第三，它们可以帮助您思考每个单元的接口和要求。