bobbing

I could see his ginger head bobbing about.

我可以看到他黄色的脑袋上下移动。

The small boat was bobbing on the sea.

小船海里上下摆动。

A little bird was bobbing its head up and down.

一只小鸟把头上下快速摆动着。

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

小船汹涌的湖面上下摆动。

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，的。