VOA慢速英语:China Places a New, Higher Tax on Pollution(翻译)

smog - n. fog mixed with smoke : a cloud of dirty air from cars, factories, etc., that is usually found in cities

microscopic - adj. able to be seen only through a microscope; extremely small

mask - n. a covering used to protect your face or cover your mouth

ton - n. a unit for measuring weight that equals 2,000 pounds (907 kilograms)

monitor - v. to watch, observe, listen to, or check (something) for a special purpose over a period of time

stability - n. the quality or state of being stable

power plant - n. a building or group of buildings where electricity for a large area is produced