提炼的英文：
extract
refine
purify
process

参考例句：

Kerosene is a by-product of petroleum refining.
煤油是提炼石油的副产品。

The latter was refined from a drama episode (one acted as two characters: the older one shouldering the younger).
后者是提炼戏曲片段（一人扮演两人的“老背少”）。

More ammonium sulphate solution is being recovered in the process of distilling shale oil
在提炼油页岩的过程中回收的硫酸氨液比过去多了。

Abstract metal from ore
由矿砂提炼金属

Oil must be refined before it can be used.
石油使用前必须提炼。

They distilled alcohol from grain
他们从谷物中提炼酒精。

A miner extracts gold from the earth.
矿工从泥土里提炼黄金。

You refine things to make them more pure.
提炼东西就是使之变得纯净。

Let's abstract away from this particular example.
让我们把这个例子中的道理提炼出来。

Refine sugar [oil, metals]
精制[精炼,提炼]糖[油,金属]

extract是什么意思：
n. 提取物，精华；汁；摘录，选段；选曲
v. 摘录，节选；获取；设法得到；提取；取出；拔（牙）

extraction feed
萃出原料|抽出原料

extraction of groundwater
地下水的抽出

bond extracting punch
导接线撤出冲头

refine是什么意思：
v. 精炼，提纯，提炼；使高雅；改善

grain refined zone
再结晶区

You must refine your manners.
你必须使你的举止优雅高尚。

Affectedly delicate or refined;mincing.
过分讲究的过于精致或优美的；矫揉造作的

purify是什么意思：
v. 使纯净，净化；使纯洁；精炼；使纯正

To cleanse or purify or become cleansed or purified.
（使）清洁，（使）净化

purify or refine,esp by repeated distillation
净化或精炼;（尤指）分馏,精馏

To increase the concentration of, separate, or purify by or as if by distillation.
精炼用蒸馏法或好象用蒸馏法增加浓度、分离或净化