漢英對照/膝關節是人體最大的關節
< 汉英对照
膝關節是人體最大的關節。 這是一個可以彎曲和伸展以及可以稍微旋轉的關節。 它很容易受傷，很容易發展成關節炎。
The knee joint is the largest joint in the human body. This is a joint that can bend and stretch, as well as can rotate slightly. It is easily injured and can easily develop into arthritis.