Kangqing Selenium and Selenium Polysaccharide could a - gainst the effects of arsenic.是什么意思？

Kangqing Selenium and Selenium Polysaccharide could a - gainst the effects of arsenic.

康强硒及硒多糖可有效拮抗砷的这种毒作用.

selenium

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例句
Apart from selenium and vapour - deposited germanium and silicon, glasses are at least diatomic.
除了硒和汽相沉积的锗和硅之外, 玻璃至少是二原子的.

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。

polysaccharide

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例句
The virulent strains had a polysaccharide capsule and formed smooth colonies on agar medium.
有毒菌株具有多糖荚膜它在琼脂培养基上形成光滑的菌落.

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

gainst

prep. 反抗，抵抗；

例句
The people of town armed themselves a gainst all possible attack.
他们全镇的人都武装起来,准备抵抗敌人可能发动的任何袭击.

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。

effects

n. 动产，财物，家财，结果( effect的名词复数 )，效果，感受，个人财产；

例句
You could only really tell the effects of the disease in the long term, and five years wasn't long enough...
真的，这种病只能在很久以后才能看出它的影响，而5年的时间还不够长。

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。

arsenic

n. 砷，三氧化二砷，砒霜；adj. 砷的，含砷（主要指五价砷）的；

例句
Plants generally absorb and translocate relatively small amounts of arsenic into aboveground parts.
植物常常将少量的砷吸收和转移到地上部分.