4000 Duolingo Vocabulary List

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n. 生态学家 a biologist who studies the relationship between organisms and their environment

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n. 边缘 brink; perimeter; margin

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v. 封装,嵌入,插入 enclose; place in something; fix firmly in surrounding mass

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v. 使富足,使肥沃 make rich; richen; improve

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v. 撤退,撤离 make empty; remove contents of

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v. 促进,帮助,使变容易 help bring about; make less difficult

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n. 促进,帮助 act of assisting or making easier the progress or improvement of something

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a. 事实的,实际的 real; actual; based on the fact

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n. 过滤器 the device containing such a material, especially one used to extract impurities from air or water

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v. 奉承,谄媚 compliment someone, often insincerely and sometimes to win favor; enhance someone's vanity by praising them