坡跟鞋实际上是最舒服的鞋子，因为整个脚都贴着地面，身体会更加平衡，也不会弯膝摔倒了。 。

Wedges are in fact the most comfortable because the entire foot is in contact with the ground, meaning your balance is better and you're less likely to go over on your ankle.

youdao

背要直，只弯两膝。

Keep back straight and bend knees.

youdao

拐过一个弯后我们看到有个男人正在没膝深的水沟里挖土。

At the turning we see a lone man knee-deep in a ditch.

youdao

I was neither at the hot gates Nor fought in the warm rain Nor knee deep in the salt marsh, heaving a cutlass, Bitten by flies, fought.

我未曾到过火热的城门,也未曾在暖雨中作战,更未曾在没膝的盐沼里挥舞弯刀，挨着飞蝇的叮咬，苦战。

耶鲁公开课 - 1945年后的美国小说课程节选