Instead they distil the palestinian experience of exile into something real .
相反，它们把流亡的巴勒斯坦人的经历提炼成实实在在的东西。
They will not always smell the same after extraction as before as some oils are easier to distil this way .
它们提炼后的气味经常与提炼之前不同，并且有一些精油更容易用这种方法提炼。
But the science , technology and economics of treethanol are changing fast . Researchers are racing to develop ways to chip , ferment , distil and refine wood quickly and cheaply .
At present america 's corn-ethanol producers distil 14 billion us gallons ( 53 billion litres ) a year-enough to provide 10 % of america 's motoring needs and meet federal rules for renewable-fuel use .
