checkoutn.(超级市场中的)付款处；结帐；检验checkout compiler检验编译程序checkout scanning检验扫描checkout equipment检测设备checkout procedure检验过程checkout each other交互验证checkout statistics文献借阅史Checkout Test Language校验测试语言Checkout is at noon.退房时间是中午。checkout data processor校验数据处理机Checkout and Maintenance检查及维修