The boat bobbed up and down on the water.
小船在水面颠簸。
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。
This problem has bobbed up again.
这个问题又出现了。
A familiar face bobbed up in the crowd.
人群中突然出现了一张熟悉的脸。
The float bobbed up and down on the water.
漂浮物在水面上浮动。
The float bobbed up and down on the water.
漂浮物在水面上浮动。
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