his knee has been bothering him for some time
他的膝盖不舒服已经有一段时间了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
His knee has been bothering him for some time.
他的膝不舒服，已有一段了。
youdao
应用推荐
模块上移
模块下移
不移动