He suffered a kick to the knee.

他的膝盖被踢了一脚。

《柯林斯英汉双解大词典》

youdao

These jeans are torn at the knee.

这牛仔裤膝盖那儿破了。

《牛津词典》

Mr.Heppner had his own leg tied back so that a wooden leg could be attached at the knee.

VOA: special.2010.06.11

If you tap somebody on the knee, your leg will jump out.

如果你轻击某人的膝盖,小腿就会弹出去

耶鲁公开课 - 心理学导论课程节选

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

In another cubicle a patient is being treated for a bullet through the knee.

BBC: How Los Angeles surgeons cope in the gang war zone

Andrews is burying himself in work--like patching up the knee of Sacramento Kings star Chris Webber.

FORBES: Magazine Article

Mr. Assefa lost his leg above the knee in a train accident early last year.

WSJ: Boston Marathon Amputees Face New Reality