This is known as vacuum fractionation.

这就是所谓的真空分馏。

Migration fractionation can form derived condensate and residual oil.

运移分馏作用可以产生衍生凝析油和残余油。

Also, it is discussed about the role of organic acid on fractionation.

同时，探讨了弱有机酸的存在对轻重稀土分馏的影响。

Fermentation required only a day, and fractionation was not complicated.

发酵只需要一天，分馏并不复杂。

Why is this an important consideration in studies involving cell fractionation?

为什么在涉及细胞的分级分离时，这是一重要的考虑？