clean air act amendment造句

例句与造句

1. Clean air act amendment ( 1987 ) established a national air - quality standard for ozone
   1987年洁净空气法修正案建立了空气的国家空气质量标准。
2. Clean air act amendment ( 1977 ) established new deadlines for cleaning up polluted areas ; also required review of existing air - quality standards
   1977年洁净空气法修正案确定了清理被污染区域的新期限，同时要求对现行空气质量标准进行评估。
3. It's difficult to find clean air act amendment in a sentence. 用clean air act amendment造句挺难的