And why are those rivers often shaped so sinuously?

为什么河流总是蜿蜒曲折的呢？

The narrow causeway meandered sinuously among the green rice-fields.

狭窄的堤道在绿色的稻田间蜿蜒曲折。

There was a nasty hissing noise as Filch swelled with fury; Mrs. Norris had arrived, unseen, and was twisting herself sinuously around Filch's skinny ankles.

费尔奇勃然大怒，发出令人厌恶的嘘声，洛丽丝夫人不知什么时候来了，然后弯曲她的身体，环绕在费尔奇的瘦脚踝上。

A great ladder of eighteen flights climbs the last ravine, and to see it from below, sinuously mounting the precipitous face to the great arch that leads on to the summit, is enough to daunt the most ardent walker.

一道 18 层的大梯子爬上了最后的峡谷，从下面看到它，从陡峭的山坡上蜿蜒地爬上通向山顶的大拱门，足以让最热心的步行者望而生畏。