例句：

　　She gave her knee a quick rub.

　　她很快地揉了揉膝蓋。

　　It hurts when I bend my knee.

　　我的膝蓋一彎就疼。

　　The water was only knee-deep.

　　水只有齊膝深。

　　I fell over and cut my knee.

　　我摔倒了，劃破了膝蓋。

　　Is your knee still painful?

　　你的膝蓋還疼嗎？

　　I had only bruised my knee.

　　我只是膝蓋受了瘀傷。