Measles, mumps and whooping cough are spreading again because children are not being vaccinated.是什么意思？

Measles, mumps and whooping cough are spreading again because children are not being vaccinated.

因为孩子们没接种疫苗，麻疹、腮腺炎和百日咳又蔓延开来。

measles

n. <医>麻疹，[兽]（牛，猪的）囊虫病，[摄]斑点，<美俚>梅毒，麻疹的红斑点；

例句
The measles is caused by a kind of specific epiphyte.
麻疹是由一种特殊的真菌引起的.

mumps

n. 腮腺炎；

例句
It'should be differentiated among endolymphatic hydrops , perilymph fistula , mumps deafness , and otitis media with effusion.
结论:小儿的突发性耳聋其预后较成为差.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

whooping

adj. 发嗬嗬声的，发咳声的；v. 叫喊( whoop的现在分词 )，高声说，唤起；

例句
Have you had your child vaccinated against whooping cough?...
你给你的孩子打过百日咳疫苗了吗？

cough

vt.& vi. 咳嗽，（引擎等）发噗噗声，咳出；n. 咳，咳嗽，咳嗽病，（机关枪等的）连续发射声；

例句
Graham began to cough violently...
格雷厄姆开始剧烈咳嗽。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

spreading

v. 撒布，伸开( spread的现在分词 )，展开，（使）传播，（使）散布；

例句
A cloud of volcanic ash is spreading across wide areas of the Philippines...
火山灰云层正在菲律宾大范围扩散。

again

adv. 再一次，再说，此外，不过；

例句
It's easier to take a taxi. But then again you can't always get one...
打出租车要容易些，但也并不总是能打到的。

because

conj. 因为；

例句
5,000 people die every year because of accidents in the home...
每年有5,000人死于家中的意外事故。

children

n. 孩子们(child的复数)，儿童，膝下，孥；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

being

n. 存在，生物，人，要素，本质；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

vaccinated

adj. [医]已接种的，种痘的，接种过疫菌的；v. 给…接种疫苗( vaccinate的过去式和过去分词 )，注射疫苗，接种疫苗；

例句
Dogs must be vaccinated against distemper...
狗必须接种犬瘟热疫苗。