1.customer service 客服中心

例句:The firm has an excellent customer service department.
该公司有一个非常出色的客户服务部。

2.Shut down 关闭

例句:Smaller contractors had been forced to shut down.
规模较小的承包商已被迫歇业。

3.check out 结账离开

例句:They packed and checked out of the hotel.
他们收拾好东西，办理了退房手续。

4.log on 登陆；注册

例句:Customers pay to log on and gossip with other users.
顾客付费后登录系统和其他用户聊天。