from time to time(fromtimetotime)

不时, 偶尔, 间或,有时

1. From time to time he fired questions at me. 他不时向我提出许多问题。

2. Ships are laid up, from time to time, for repairs. 船只常常因不能使用而需要修理。

3. I can see Hieks at the library from time to time. 我在图书馆有时能看见希克斯。

4. Good ideas swim into my mind from time to time. 我的脑海里不时地会浮现出一些好主意。

5. From time to time,she gave him an encouraging nod. 她不时对他点头鼓励。