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When oil in a hair follicle cannot get out, acne shows up.
当油进入了毛囊，并无收回来，粉刺就呈现了。
youdao
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It is currently believed that the immune system suppresses the hair follicle.
这是目前认为，免疫系统抑制毛囊。
youdao
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It is currently believed that the immune system suppresses the hair follicle.
这是目前认为，免疫系统抑制毛囊。
youdao