7.High School English Listening

Acne: the scourge of adolescence. Most people endure it at some point, and can’t wait to be rid of the combination of whiteheads, blackheads, pimples, and pustules that comprise the skin condition that affects over 80% of teenagers and nearly 20% of adults.
What Is Acne?
Acne begins with the pores from which hair grows. These pores contain sebaceous glands that produce a type of oil that lubricates hair and skin. When the glands produce the right amount of oil, there’s usually no trouble.
But, when a pore gets clogged with too much oil and dead skin cells, problems arise. The onset of puberty in most kids involves the production of hormones. These hormones cause the sebaceous glands to make excess oil. Too much oil clogs pores and attracts bacteria, which feed on the oil and begin to multiply. A clogged pore can only stand so much internal pressure before its walls break, allowing the oil and bacteria to seep under the surrounding skin. This gives rise to something every teen dreads: a pimple.
Acne Causes
Contrary to popular belief, eating foods such as pizza and chocolate does not cause or exacerbate acne. Whether or not a person will have acne as a teenager or adult is largely a matter of genetics: if your parents had it, there’s a good chance you will too.
Although there is no cure for acne, simple remedies to prevent a build-up of oil in pores, such as washing your face with soap and warm water and using oil-free cosmetics, can help.
译文：
痤疮：青春期的祸害。大多数人都会在某个时候忍受它，并迫不及待地想摆脱白头、黑头、丘疹和脓疱的组合，这种皮肤状况影响了80%以上的青少年和近20%的成年人。
什么是痤疮？
痤疮始于毛发生长的毛孔。这些毛孔含有皮脂腺，产生一种润滑头发和皮肤的油。当皮脂腺产生适量的油时，通常不会有问题。
但是，当毛孔被过多的油脂和死皮细胞堵塞时，就会出现问题。大多数孩子青春期的到来涉及到荷尔蒙的产生。这些荷尔蒙导致皮脂腺分泌过多的油脂。过多的油脂会堵塞毛孔并吸引细菌，这些细菌以油脂为食并开始繁殖。堵塞的毛孔只能承受如此大的内部压力，然后其壁就会破裂，使油和细菌渗入周围的皮肤下。这就产生了每个青少年都害怕的东西：痘痘。
痤疮的原因
与流行的看法相反，吃披萨和巧克力等食物并不会导致或加剧痤疮。一个人在十几岁或成年时是否会有痤疮，在很大程度上是一个遗传问题：如果你的父母有痤疮，你很可能也会有。
虽然没有治愈痤疮的方法，但防止毛孔中油脂堆积的简单补救措施，如用肥皂和温水洗脸，使用无油化妆品，可以帮助你。
重点词汇：
at some point 在某些时候
What Is 是什么 ; 什么是 ; 什麽
a type of 一种类型的…
lubricates 给…上润滑油 ; 上油于 ; lubricate的第三人称单数
too much 太多 ; 过分