总机

例句：

1. 1. The hotel has a 24-hour front desk for guests to contact the general manager.
   这家酒店有一个24小时前台，供客人联系总经理。
2. 2. The exchange is located in the center of the city and can be reached by subway.
   该交换所位于市中心，可通过地铁到达。
3. 3. The switchboard operator answered my call and informed me that I had reached the correct number.
   接线员接了我的电话，告诉我我拨打的是正确号码。