like clockwork

1. 顺利地

The arrangements for the holiday went like clockwork.

度假的各项安排进行得很顺利。

regular as clockwork

1. 极有规律的

He is as regular as clockwork in his habits.

他的生活习惯非常有规律。

2. 极有规律地

She used to come here every Saturday evening as regular as clockwork.

她过去每逢星期六傍晚必来此地。