Think back on your own teen years. Remember your struggles with acne or your embarrassment at developing early - or late.

回想一下你自己十几岁时的情形，想想你是如何跟青春痘叫劲的，你是否曾经因为发育过早或过晚而感到难为情。

youdao

Acne is a condition of the sebaceous glands and it usually starts in the teen years when the hormone androgen stimulates the sebaceous glands of the skin to enlarge, produce oil and plug the pores.

痤疮是一种皮脂腺状态，常起病于少年期，由于雄性激素的刺激，皮脂腺增大，产生油脂并堵塞毛孔。

youdao