It makes a significant contribution materia medica , dietetics and nourishment.是什么意思？

It makes a significant contribution materia medica , dietetics and nourishment.

对本草学、食疗学 、 营养学均有贡献.

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

makes

v. 使( make的第三人称单数 )，成为，做，认为；

例句
This recipe makes a good accompaniment to ice-cream.
这道食谱适合搭配冰激凌。

significant

adj. 重要的，显著的，有重大意义的，意味深长的；

例句
You can look forward to a significant cash return by saving from as little as £10 a month...
只要每个月存下区区10英镑，你就有希望得到相当可观的现金收益。

contribution

n. 贡献，捐赠，捐助，捐赠，捐助物，投稿，来稿，[军]（向占领地人民征收的）军税；

例句
He was awarded a prize for his contribution to world peace.
他由于为世界和平做出贡献而获奖。

Materia

--

例句
The Compendium of Materia Medica has been held in high esteem since it was first published.
“本草纲目”问世之后,深受人们的推重.

dietetics

n. 饮食学，膳食学，营养学；

例句
It makes a significant contribution materia medica , dietetics and nourishment.
对本草学、食疗学 、 营养学均有贡献.

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。

nourishment

n. 食物，滋养品，营养品，“nourish”的派生；

例句
He ventured that plants draw part of their nourishment from the air...
他大胆提出植物从空气中吸收部分养分的观点。