慢速英语:木头能比钢铁更坚硬吗?
日期:2018-03-05
Words in This Story
component – n. a piece or part of something
polymer – n. a chemical substance that is made of small molecules that are ordered in a simple repeating structure
wind turbine – n. a large machine that is used to produce electricity
dense – adj. having parts that are close together; thick
fiber – n. a thin piece of natural or man-made material
raw – adj. not cooked or prepared; uNPRocessed
cheap – adj. low-cost; not pricey
expensive – adj. costly
binder – n. a cover for holding pieces of paper together
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