总氨基酸含量在胚胎发育早期下降较快, 胚胎发育至后无节幼体期氨基酸含量下降幅度变缓.用英语怎么说？

总氨基酸含量在胚胎发育早期下降较快, 胚胎发育至后无节幼体期氨基酸含量下降幅度变缓.

However , content of the dissolvable protein and amino acid during gastrula stage during blastula stage.

however

adv. 不管到什么程度，无论如何，然而，可是；conj. 不管怎样；

例句
The fact remains that inflation, however you measure it, is unacceptably high...
必须承认，无论怎么衡量，通货膨胀率都高得难以接受。

content

n. 内容，（书等的）目录，满足，容量；

例句
It contains less than 1 per cent fat, an appreciable amount of protein, and a high content of minerals...
它所含脂肪不到1%，富含蛋白质，矿物质含量也很高。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

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

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。

dissolvable

adj. 可溶解的，可分解的，可解散的；

例句
Objective To explore a method for determination of dissolvable zinc salt in deodorizing cosmetics.
目的研究除臭剂等化妆品中可溶性锌盐的测定方法.

protein

n. [化]朊，蛋白（质）；adj. 蛋白质的；

例句
Too much protein in the diet may advance the ageing process...
饮食中摄入过量蛋白质可能会加速衰老。

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。

amino

adj. <化>氨基的；

例句
The biggest to amino acerbity demand still is animal feed additive.
对氨基酸需求量最大的仍是动物饲料添加剂.

acid

adj. 酸味的，尖刻的，酸的，酸性的；n. <化>酸，酸味物质；

例句
This comedy of contemporary manners is told with compassion and acid humour.
这部当代风尚喜剧杂糅了悲悯的情怀和尖酸的幽默。

during

prep. 在…的时候，在…期间，当…之时，其间；

例句
...the accrual of funds used during construction.
建设过程中资金的累积

gastrula

n. 胚囊，肠胚；

例句
However , content of the dissolvable protein and amino acid during gastrula stage during blastula stage.
总氨基酸含量在胚胎发育早期下降较快, 胚胎发育至后无节幼体期氨基酸含量下降幅度变缓.

stage

n. 阶段，舞台，戏剧，驿站；vt.& vi. 上演，演出，筹办，举行，适于上演，坐公共马车旅

例句
The woman he had seen performing on stage was in actuality quite older than she had seemed.
他所见的那个在舞台上表演的女人实际年龄比看上去要大很多。

blastula

n. 囊胚；

例句
It enter the late blastula stage in 6 h 50 min.
6小时50分进入低囊胚期.