Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.

昆虫黑化是自然界中普遍存在的一种多型现象，也成为揭示物种在自然界中进化与适应的经典范例。

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While the current study only looks at the classical behavior of the theory, there could also be quantum behavior, such as with the bounce concept.

虽然现在的研究仅仅集中在这套理论的经典行为上，但是量子行为也可能存在，例如在跃变的概念下。

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A study by the University of Washington showed that copyeditors who listened to classical music for 90 minutes while editing copy found 21% more mistakes than those who did not.

一项华盛顿大学的研究表明，校对者在校对时听了超过90分钟的古典音乐后，校对出的错误对比没有听的人多出21%。

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He said that one of the happiest times of his life was spent at the American School of Classical Study in Athens in the 1930s.

ECONOMIST: Nathan Pusey

He says part of the problem is that too few people now study classical Greek, Latin or Arabic and there are not enough experts to interpret the original texts.

BBC: Plants found in ancient pills offer medicinal insight

Isaac is not easily distracted by bright skies or promising winds, and Henry envies the singular attention he devotes to his study of classical languages and the spiritual writings of Orestes Brownson.

NPR: Excerpt: 'Woodsburner'