以下为句子列表：
英文: A focal length only half the diagonal of the film frame, produced with an almost symmetric lens design of surprising compactness, featuring the typical advantages of symmetrical lens designs: distortion is extremely well controlled, and so is color correc
中文: 只有胶片对角线长度一半的焦距、惊人的紧凑和几乎对称的镜头设计，使之具有对称结构镜头的典型优点：控制得极好的变形、色彩矫正和像场平坦度。
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英文: A method of estimating the maximum and minimum eigenvalue of real symmetric matrices is given in this article, and its application is also discussed.
中文: 摘要本文给出了实对称矩阵最大与最小特徵值的一种估计方法及其应用。
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英文: A new form generation method for ultra-precision axisymmetric aspheric mirrors is introduced.
中文: 摘要介绍了轴对称光学非球面镜超精密加工的新方法。
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英文: Abstract: Recent advances in asymmetric hydrosilylation of prochiral carbonyl compounds catalyzed by chiral transition metal complexes are reviewed in this paper with 47 references.
中文: 文摘:评述了近年来手性金属配合物催化的前手性羰基化合物的不对称硅氢化反应研究进展。
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英文: 9 eyes of blephanrptosis were completely corrected, 7 eyes had symmetric double eyelids.
中文: 9眼上睑下垂全部矫正,7眼双眼重睑对称,眼欠对称。
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