This is what accumulates in the tar sands of Alberta. These are sulfur blocks. Because as you separate that petroleum from the sand, and use an enormous amount of energy inside that vapor -- steam to separate this stuff -- you also have to separate out the sulfur. The difference between light crude and heavy crude -- well, it's about 14 bucks a barrel. That's why you're building these pyramids of sulfur blocks. And by the way, the
这是一种积聚在阿尔伯塔的油砂中的物质， 大堆大堆的硫磺。因为我们在从油砂中 分离石油的时候，要使用 大量的能源进行蒸馏， 用蒸汽分离这些物质——你同时会分离出 硫磺来。轻质原油与重质原油的差别在于， 它们的价格每桶相差14美元。 这就是为什么你会看到这些堆的象金字塔 般的硫磺。并且，这些东西的