The sea's undulations, which had been creating a gentle rocking motion, now ceased.

使入觉得微微转动的大海波动现在也停止了。

I imagine this kind of like rocking chair motion, someone being a bit crazy.

我想这有点像摇椅运动，某人有点疯狂。

The rocking motion makes me seasick and nauseous.

摇摆的动作让我晕船和恶心。

By day, navigators could identify direction by the rocking motion of their canoes caused by these swells.

白天，航海者可以通过这些涌浪引起的独木舟摇摆来确定方向。

A " rocking (rocking) motion" is a motion that goes back and forth many times, usually somewhat slowly.

“摇摆（rocking）运动” 是一种来回多次的运动， 通常有些缓慢。

I sat as still as a stump, and if he saw me, as I suspect, he was a gentleman and went on steadily with his business, then loped away with a graceful rocking motion.

我像个树桩一样一动不动地坐着，如果他看到我，正如我怀疑的那样，他是一位绅士，稳步地继续他的生意，然后以优雅的摇摆动作大步离开。