油已硬化成沥青了。
On the one hand, America already imports plenty of oil from the tar sands.
一方面，美国已有大量的焦油砂制油进口额。
The thick, tar-like oil requires extra heat to flow.
这种石油浓稠、类似于柏油，要使它流动需要额外的热量。
No self-respecting oil major has let a position in the tar sands pass by.
任何有自尊的石油巨头过去都回避进入油砂开采行业中。
No self-respecting oil major has let a position in the tar sands pass by.
任何有自尊的石油巨头过去都回避进入油砂开采行业中。
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