He tends to sit on the fence at meetings.

开会时他往往持观望态度。

You can't sit on the fence any longer - you have decide whose side you're on.

你不能再骑墙观望了——你必须决定支持谁。

She considered that it was better for her to sit on the fence during the quarrel.

她认为在这场争吵中自己还是保持中立为好。

When Jane and Tom argue, it is best to sit on the fence and not make either of them angry.

当简和汤姆争吵时，最好保持中立，不要忍到其中任何一个人。

Sooner or later you'll have to come down on one side or the other; you can't just sit on the fence.

你迟早会倒向这边或那边，不能只是采取骑墙态度。