请英语高手进来翻译几个理论的句子

所谓竞争力，简单的说就是市场经济中经济主体争夺资源和市场份额的能力。
Put simply,the so-called competiveness is the capacity of scramble of economic main body for resources and market share in market economy

不可替代性意味着异质性，异质性越强，替代性越弱，竞争性也越小。
Irreplaceability means heterogeneity, so the stronger heterogeneity is, the weaker substitutability is, and the less competiveness is .

竞争市场：有许多买者与卖者，以至于每个人对市场价格的影响都微乎其微的市场。
Competitive market: There is so large a number of purchasers and sellers that every individual has little influence on the market price.

人工翻译,还望满意.

Competitive strength,to be simple,is the ability of the economic main party to seize the quota in market economy.
The irreplaceablity means distinction,the more it distinct from others, the less likely will it be replaced by them and the less likely will it be competed.
The competitive market: The market which has so many buyers and sellers that the individual influence is next to nothing.

所谓竞争力