提出一种萃取溶剂分子设计中预选官能团的新方法，可以有效地缩小分子设计问题的规模。

A new method was proposed to preselect group for molecular design of extraction solvents, which can reduce the workload of molecular design efficiently.

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对分子蒸馏分离烟草提取物的溶剂进行了研究。利用正交试验设计研究了影响溶剂萃取的各种因素，并确定了较合理的萃取条件。

The orthogonal test was used to study the different factors that influence the solvent extraction of tobacco, and then the optimum testing conditions of extraction were determined.

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