emission standard

• 排放标准

emission standard的用法和样例：

例句

1. One set of provisions tightens emission standards.
   一套使排放标准更加严格的规定。
2. California still needs a waiver from the EPA in order to enforce its own emissions standards.
   加州要实施自己的排放标准，还必须从环保署取得弃权声明书。