Body skin and facial skin is very different, such as knee, shoulder and leg skin.

身体肌肤与面部肌肤有很大区别，比如膝盖部位，肩部和腿部肌肤。

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Generally, a few large joints are involved, such as hip or knee.

主要累及大关节，比如髋关节或膝关节。

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Generally, a few large joints are involved, such as hip or knee.

主要累及大关节，比如髋关节或膝关节。

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