VOA慢速英语:Research Breakthrough for Biodegradable Tires?(翻译)

synthetic – adj. something not made from natural substances

biodegradable – adj. able to break down without harming the environment

recyclable – adj. able to be reused after processing

decompose – v. to gradually decay until destroyed

breeding – n. the process animals use to produce babies

by-product – n. something that happens as a result of something else

polymer – n. a chemical mix that is made of small molecules that are arranged in a simple repeating structure to form a larger molecule