Pruritus is an essential feature of atopic dermatitis.

瘙痒是特应性皮炎的一个基本特征。

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Polysemy is an essential feature of a language's economy and efficiency.

一词多义是语言的经济性和高效率的重要特征。

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Course collaboration is an essential feature in a collaborative learning environment.

课程协作是协作学习环境中必不可少的特性。

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"The right to argue, to complain, and to protest is an essential feature of our democratic society, " he said.

BBC: You are in: UK Politics

Proponents of the law say the mandate is an essential feature because without it consumers will simply wait until they are sick to buy insurance and rapidly destroy the private insurance market.

FORBES: Supreme Court Takes On Obamacare Challenge

The table has subsequently become an essential and instantly recognisable feature of any model of the Falcon.

ENGADGET: Movie Gadget Friday: The Dejarik Holochess game from Star Wars