In batch distillation, the composition of the source material, the vapors of the distilling compounds and the distillate change during the distillation.
间歇式蒸馏时，原料的成分、所蒸馏的化合物的蒸汽及蒸馏物在蒸馏过程中是变化的。
In batch distillation, the composition of the source material, the vapors of the distilling compounds and the distillate change during the distillation.
间歇式蒸馏时，原料的成分、所蒸馏的化合物的蒸汽及蒸馏物在蒸馏过程中是变化的。
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