飞机在树林上空兜圈子。

The plane is circling above the forest.

飞机兜了两个圈子飞走了。

The plane circled twice before leaving.

说话兜圈子

talk in a roundabout way

别跟我兜圈子，有话直说吧！

Don't beat about the bush – out with it!

必须抓住问题的关键，而不应在枝节问题上兜圈子。

It is important to get to the crux of the problem and not to get sidetracked by irrelevant issues.