电镀是国民经济中较小却必不可少的基础工艺性行业，同时也是重污染行业。

Electroplating industry is necessary in national economy and it is also a badly polluted industry.

youdao

电镀是国民经济中较小却必不可少的基础工艺性行业，同时也是重污染行业。

Electroplating industry is necessary in national economy and it is also a badly polluted industry.

youdao