慢速英语:绿色和平称塑料、化学污染在南极洲普遍存在

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extrapolate - v. to form an opinion or to make an estimate about something from known facts

rationale - n. the reason or explanation for something

sample - n. a small amount of something that gives you information about the thing it was taken from

sanctuary - n. a place where someone or something is protected or given shelter

significant - adj. large enough to be noticed or have an effect

proper - adj. correct according to social or moral rules