因此，水产养殖环境工程技术的研究与开发，已成为当今社会经济和环境领域的系统工程问题。

The research and development of the environment engineering have been the system engineering problem in social economy and environment control.

youdao

并成为国内首家设计，承建水产养殖纯氧供氧工程的企业。

And become the first in design, construction of aquaculture enterprises pure oxygen works.

youdao

并成为国内首家设计，承建水产养殖纯氧供氧工程的企业。

And become the first in design, construction of aquaculture enterprises pure oxygen works.

youdao