4000 Duolingo Vocabulary List

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n. 刮削下的碎屑 deep bow with the foot drawn backward

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n. 羞怯,胆怯 the feeling of fear of embarrassment

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v. 孵化,下蛋 lay eggs; produce offspring in large numbers

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a. 自发的,自然的 arising without external cause; growing without cultivation or human labor

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n. 松鼠 a kind of arboreal rodent having a long bushy tail

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a. 不新鲜的,陈腐的 having lost freshness; lacking originality or spontaneity

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v. 驾驶,掌舵 drive; direct;  guide by means of a device such as a rudder, paddle, or wheel

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n. 刺激物,兴奋剂 the drug that temporarily quickens some vital process; acts to arouse action

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a. 真实的,有实质的,大量的 essential; not imaginary; actual or real

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a. 肤浅的,浅薄的 trivial; of little substance; involving a surface only