分离易挥发的化学物质的蒸馏法，其中生成物被收集在一系列单独的馏分里，每种馏分的沸点都比未分馏前高。
Distillation to separate volatile chemical substances in which the products are collected in a series of separate fractions, each with a higher boiling point than the previous fraction.
大部分不能用的血（56，809品脱）被运到加利福尼亚伯利克市的Cutter实验室，用于血浆分馏，但是还有347品脱血被用在当地的军事医院。
Most of it (56,809 pints) was sent to the Cutter Laboratories, Berkeley, Calif. , for plasma fractionation, but 347 pints were used in local military hospitals.
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