正文

科学家让昆虫帮助科罗拉多河鱼

2018-05-10来源:和谐英语

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Words in This Story

diversity – n. the quality or state of having many different forms, types, ideas, etc.

downstream – adv. in the direction in which a stream, river, etc., flows

hatch – v. an opening in the deck of a ship or in the floor, wall, or roof of a building