一方面,美国已有大量的焦油砂制油进口额。
On the one hand, America already imports plenty of oil from the tar sands.
在工业中,碘是合成有机燃料的主要成分,可以制酞系的焦油燃料。
In industry, iodine is the main content of composing organic fuel, which can make phthalein series tar fuel.
去除焦油,即制得所需气体。
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