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123吳豆豆木蟲 (著名寫手)
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[求助]
求把這句話翻印成中文
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| It is seen from the scheme that when the 2-benzoyl and the 3-aryl groups are in cis-configuration the chemical shifts of the aromatic protons are significantly up-field shifted in comparison with those of the corresponding trans-isomers due to the mutual shielding of the two phenyl rings |
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