清洁生产是依靠科技进步，改进技术而得到的清洁生产过程，通过清洁生产可以获得清洁的产品。

The main content of Cleaner Production is that it has cleaner production processes and cleaner products, which can be got by means of technology development.

youdao

但如果天然气的生产过程是不清洁的，那么它的成本低廉就无从谈起。

But if natural gas is not produced cleanly, it will not prove to be so cheap, either.

youdao

新买来的衬衫，须洗涤之后再穿，以除去生产过程中可能存在的脏污，确保贴身穿着时清洁卫。

Bought a new shirt, must wash before wearing, to remove the production process may exist in the dirt, to ensure that personal wearing clean health.

youdao