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摆着。

The small boat was bobbing on the sea.

小船海里上下摆。

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

小船汹涌的湖面上下摆。

I could see his ginger head bobbing about.

我可以看到他姜黄色的脑袋上下。

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.

1940年代晚期，，车子可以转变成飞机，电视的。