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时差N小时:为什么嘴唇会干呢?

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Let's start by reviewing the ways in which the surface of ourlips is different from the surface of the skin on the rest of ourbodies.

首先,我们需要知道嘴唇的表皮有别于身体其他部位的。
Basically, our lips are made of the same mucusmembrane that coats the inside of our mouths.
基本而言,嘴唇有相同的粘液膜组成,保护我们的嘴巴。
This means two things.
这就说明了两件事。
First, our lips don't have the same protective outer layer as theskin elsewhere on our bodies.
第一,我们身体其他部位的肌肤有一层“保护层”,这是嘴唇所没有的。

This layer is part of the barrier to evaporation, and its absencemeans our lip skin retains less fluid.

“保护层”能有效保湿,嘴唇因为没有而不易保湿。
Second, our lips don't have the same glands and pigmentsas ordinary skin.
第二,嘴唇不像其他肌肤有腺体和色素。
For example, lips don't have oil glands, which also help keep moisture from evaporating, and they contain less melanin, the pigment that helps protect our skin from sunburn.
比如,嘴唇不能分泌油脂,不易保湿。此外,嘴唇缺少黑色素等色素保护皮肤免受太阳灼伤。
What's more, unlike much of the rest of our body, our lips are almost always on display, and rarely covered by clothing.
别于身体其他部位的皮肤,嘴唇经常暴露在外面。
As a result,the moisture on our lips is continually evaporating.
这样一来,嘴唇的水分一直在蒸发,
And that's before we take into accountexposure to sun, wind, cold, and air-conditioning.
这还不算阳光、大风、天冷、空调的“摧残”。
Plus, if you're sick or have allergies, and your nose is congested, your lips end up drying more quickly because you tend to breathe throughyour mouth.
此外,嘴唇有此外,如果你生病了或者过敏而鼻塞,不得不用嘴巴呼吸,嘴唇会干得更快!

重点单词   查看全部解释    
contain [kən'tein]

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vt. 包含,容纳,克制,抑制
vi. 自制

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layer ['leiə]

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n. 层
vi. 分层
vt. 将某

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protect [prə'tekt]

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vt. 保护,投保

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tend [tend]

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v. 趋向,易于,照料,护理

 
display [di'splei]

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n. 显示,陈列,炫耀
vt. 显示,表现,夸

 
pigment ['pigmənt]

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n. 色素,颜料 v. 把 ... 加颜色,变色

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evaporation [i.væpə'reiʃən]

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n. 蒸发,消失,脱水,干燥

 
barrier ['bæriə]

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n. 界线,屏障,栅栏,障碍物

 

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