Poly alcohol has been protected against radiation by benzalation and benzoylation.是什么意思？

Poly alcohol has been protected against radiation by benzalation and benzoylation.

聚乙烯醇的耐辐解可通过苄叉化和苯甲酰化提高.

alcohol

n. 乙醇，酒精，含酒精的饮料；

例句
...drug and alcohol abuse.
嗜毒和酗酒

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

been

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去分词 ），在，存在，不受干扰，去过了，be的过去分词；

例句
Have you been able to have any kind of contact?...
你联系上了吗？

protected

v. 保护( protect的过去式和过去分词 )，防护，投保，关税保护；

例句
The birds are additionally protected in the reserves at Birsay...
鸟类在伯赛的保护区尤其受到保护。

against

prep. 反对，对…不利，紧靠，以防；

例句
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。

radiation

n. 辐射，放射物，辐射状，分散；

例句
Her hair started falling out as a result of radiation treatment.
由于放疗，她开始掉头发。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

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

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。

benzoylation

苯甲酰（作用）；

例句
METHODS: The target compound was synthesized from N - benzyl protected aminoacetophenone through hydrogenation, benzoylation and reduction.
方法: 以氮 - 苄基保护胺基酮为原料,经氢化, 苯甲酰化,还原三步合成双苯甲酰沙丁胺醇酯.