为halohydroxypropyl -三烷基铵的制备工艺卤化物
process for preparation of halohydroxypropyl-trialkyl-ammoni
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请问这句话对么?It is during the process of the preparation for TOEF
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except,except for的区别;die of,die from;prepare,prepare for的区别
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英语翻译Plasma processing for surface modification of trivalent
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prepare for , prepare
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prepare for和prepare
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是be prepare for还是 prepare for
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英语翻译Process – a sequence of steps performed for a givenpurpo