When a fish bites the hook, the float bobs.

当鱼上钩时, 鱼漂上下。

A little bird was bobbing its head up and down.

一只小鸟把头上下快速着。

The small boat was bobbing on the sea.

小船在海里上下。

The small boat was bobbing on the rough water of the lake.

小船在汹涌湖面上下。

I could see his ginger head bobbing about.

我可以看到他姜脑袋在上下移。

It's the late 1940S,people flew in an aerocar,a car that could turn into an airplane, on TV's "love that bob" show.

在1940年代晚期，，车子可以转变成飞机，在电视。