电话订票系统的英文：
telephone booking system
n. 电话
v. 打电话，通电话
Receptionists'telephones are always engaged.
接待员的电话总是占线。
I have to make a telephone call.
我必须打个电话。
I telephoned to thank her.
我打电话向她道谢。
n. 预约，预订；挂号；订货；演出契约
v. book的现在分词；预约，预订
subsidiary book
辅助帐簿; 明细帐簿
It was a stupid book.
那是一本无聊的书。
This is the sum of this book.
这就是这本书的要点。
n. 体系，系统；设备；制度；方法；身体；次序
Is the system unstable?
是系统不稳定吗？
It was not a perfect system.
它不是一个完美的系统。
This is a sexpartite system.
这是一个由六部分组成的系统。