0 relating to rules that limit what vehicles can be used, what fuels can be burned, etc., in order to reduce the amount of pollution in the air -- (燃料等)清洁的,不污染空气的
The city has been designated a clean air zone. 这个城市已被指定为清洁空气区。
Clean-air advocates say health costs must be weighed along with the expense to business. 清洁空气倡导者表示健康代价必须与商业成本一起权衡。
More factories are using low-sulphur coal to comply with clean-air regulations. 越来越多的工厂正在使用低硫煤来遵守清洁空气法规。
The area failed to attain federal clean-air goals.
Clean-air activists would like to see ozone controlled further.
The president has produced his own clean-air proposals.
He is pushing for clean-air rules and alternative energy sources.
最新单词
European
2021年8月16日
每日一词
Shimmer
clean-air