请在会议前一天给我们发个短信确认。

Please ___confirm by text the day before the meeting.

这条铁路线采用了集中调度控制系统来管理列车运行。

This railway line uses ___CTC to manage train operations.

别废话了，直接说你到底想要什么！

Just ___CTC and tell me what you really want!