“膝部”用英语怎么说？

“膝部”的拼音为：xī bù...

呼气，膝部放松向胸部靠拢。Breathe out and ease your knees in toward your chest.他的一条腿不得不从膝部以上截断。He had to have one leg amputated above the knee.送信人弯下腰来，挠着膝部被绑腿磨红的地方。The messenger bent and scratched at his knee where the strapping chaf...