Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.是什么意思？

Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.

收率相对于丙二酸二乙酯达到了80%以上.

through

prep. 通过，穿过，经由，透过，凭借；adv. 从头到尾，彻底，自始至终；adj. （电话）接通，通话完毕，有洞的，直达的；

例句
The proposal was instantly voted through with two to one in favour, accompanied by enthusiastic applause...
在热烈的掌声中，提案以2比1的优势很快通过了表决。

hydrogenate

v. 使与氢化合，使氢化；

例句
Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.
收率相对于丙二酸二乙酯达到了80%以上.

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。

acylate

n. 酰化产物，有机酸盐[酯]，酰化（作用）；

例句
Through nitrosation , hydrogenate reducion, and acylate three steps, the yield surpass 80 % for the diethyl malonate.
收率相对于丙二酸二乙酯达到了80%以上.

three

num. 三，三个，第三（章，页等）；n. 三岁，三个人[东西]，三，三个；adj. 三的，三个的；

例句
Outsiders who wed islanders are given only three years' right of abode at first.
岛外的人和岛民结婚之初只能获得三年的居住权。

steps

n. 级别( step的名词复数 )，脚步，步骤，步伐；v. 举步，行走，跨步( step的第三人称单数 )，离开(along)，（尤指马）轻快地走，（跳舞时）合着节拍走；

例句
Companies need to take active steps to increase exports.
各公司需要采取积极措施增加出口。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

yield

vt. 屈服，投降，生产，获利，不再反对；vi. 放弃，屈服，生利，退让，退位；n. 产量，产额，投资的收益，屈服，击穿，产品；

例句
Will she yield to growing pressure for her to retire?...
面对要求其隐退的压力越来越大，她会屈服吗？

surpass

vt. 超过，优于，胜过，非…所能办到；

例句
He was determined to surpass the achievements of his older brothers...
他决心超越几个哥哥的成就。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

diethyl

adj. 二乙基的；

例句
The necessary material of 2 - ( 2 - methoethyl ) acetaldehyde diethyl acetal was synthesized in addition.
另外还合成了必需原料 2- ( 2- 甲氧基乙氧基 ) 乙醛二乙醇缩醛.

malonate

n. 丙二酸；

例句
Methyl dihydrojasmonate was synthesized from 2 pentyl 2 cyclopentanone and methyl malonate by condensation and decarboxylation.
2-戊基环戊烯酮再与丙二酸二甲酯缩合,脱羧得到二氢茉莉酮酸甲酯.