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1·The boat bobbed up and down on the water.

小船在水面颠簸。《牛津词典》

2·Tiny boats bobbed up and down in the harbour.

小船在港湾中颠簸。《牛津词典》

3·The dark head of a seal bobbed up a few yards away.

在几码远处一只海豹的黑脑袋猛地钻出水面。《牛津词典》

4·Peter's heart bobbed up and down as he listened.

彼得听着，心忽上忽下。

5·This problem has bobbed up again.

这个问题又出现了。

6·The periscope bobbed up behind him.

他背后的潜望镜突然冒了出来。

7·A keg bobbed up astern.

一只小圆桶突然在船尾出现。

8·A familiar face bobbed up in the crowd.

人群中突然出现了一张熟悉的脸。

9·The float bobbed up and down on the water.

漂浮物在水面上浮动。

10·There was splash in the pond, and a big goldfish bobbed up.

水池里扑通一声，一条大金鱼窜了起来。