时差N小时 嘴唇为何会干?(下)

What this means is that our lips have little to no protection from the environment, and their main source of moisture is the saliva¹ that comes from our mouths.

这就说明嘴唇易受环境影响，而嘴唇水分大多是来自嘴里的唾液。

What’s more, unlike much of the rest of our body, our lips are almost always on display, and rarely covered by clothing.

此外有别于身体其他部位，嘴唇直接暴露在外面。

As a result, the moisture on our lips is continually evaporating.

结果就造成嘴唇的水分一直在蒸发。

And that’s before we take into account exposure to sun, wind, cold, and air-conditioning.

我们的嘴唇还要暴露于阳光、大风、冷空气及空调环境。

Plus, if you’re sick or have allergies², and your nose is congested, your lips end up drying more quickly because you tend to breathe through your mouth.

此外，如果你生病或者过敏而鼻塞，嘴唇会干得更快，因为你不得不大口呼吸！

1 saliva   

n.唾液，口水

参考例句：

• He wiped a dribble of saliva from his chin.他擦掉了下巴上的几滴口水。
• Saliva dribbled from the baby's mouth.唾液从婴儿的嘴里流了出来。

2 allergies   

n.[医]过敏症；[口]厌恶，反感；（对食物、花粉、虫咬等的）过敏症( allergy的名词复数 )；变态反应，变应性

参考例句：

• Food allergies can result in an enormous variety of different symptoms. 食物过敏会引发很多不同的症状。 来自辞典例句
• Let us, however, examine one of the most common allergies; hayfever. 现在让我们来看看最常见的变态反应的一种--枯草热。 来自辞典例句