Sludge has become a stringent problem in wastewater treatment field.

污泥问题已成为污水处理所面临的一个非常严峻的问题。

youdao

Guangzhou Daily news, with a number of Internet financial rectification programs touching ground, the increasingly stringent supervision has become the industry consensus.

广州日报消息，随着多项互联网金融整治方案落地，监管日益趋严已成为行业共识。

youdao

Double sided polishing process has become a main machining method for silicon wafer finishing process, but it is difficult to get ultra-smooth surface with the very stringent machining conditions.

双面抛光已成为硅晶片的主要后续加工方法，但由于需要严格的加工条件，很难获得理想的超光滑表面。

youdao

Post Sarbanes-Oxley, a 2002 law imposing stringent new corporate requirements, board membership has become a tightly regulated, formal affair.

FORBES: How to Become a Corporate Board Member