bobbing

I could see his ginger head bobbing about.

我可以看到他黄色的脑袋在上下。

The small boat was bobbing on the sea.

小船在海里上下摆。

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 rough water of the lake.

小船在汹涌的湖面上下摆。

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，，车子可以飞机，在电视的。