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cocoon
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茧
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详细解释：
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以下为句子列表：
英文: A caterpillar must pass through the cocoon stage to become a butterfly.
中文: 毛毛虫必须经过茧的阶段才能变成蝴蝶。
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英文: A cocoon is a kind of silk covering made by an insect.
中文: 蚕茧是由昆虫制造的一种由丝组成的外包层。
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英文: Abstract: In accordance with the hypotheses that the length of cocoon filament is normally distributed random variable and the ratio of dropping end has optionally distributed form on cocoon filament, we derived the distribution of non-broken filament len
中文: 文摘:在假定茧丝长具有正态分布，茧丝上的落绪具有任意形态的部位分布的条件下，给出因落绪切断而形成的解舒丝长分布。
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英文: Adoxphyes orana occurred for 6 generations annually in Fuzhou, Fujian, it occurred by generations, the old and adult larvae overwintered by producing cocoon and turning into pupa in the bark crack and litter.
中文: 摘要橄榄黄小卷叶蛾在福建福州地区年发生6代，世代重叠，以老熟幼虫在树皮裂缝和枯枝落叶中结茧化蛹越冬。
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英文: At the sametime, this paper also suggests that the standard system of colour of silkworm cocoon silk should be established in the future research.
中文: 同时，该文又提出了在今后的研究中要建立家蚕彩色茧丝的色彩标准体系。
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