There was a trickle as black as dirty oil at the corner of his mouth.

他的嘴角处有一滴黑乎乎的脏油。

And they say this is dirty oil, a type of oil that when it`s burned, produces more greenhouse gases.

他们说这是脏油，一种燃烧时会产生更多温室气体的油。

But it's also a very dirty oil source. So, we have to ask ourselves, this isn't about Canada-U.S. relationships.

但它也是一种非常脏的油源。所以，我们必须扪心自问，这与加美关系无关。

What is not to like about that? We can build an economy on clean energy. We shouldn't be investing in dirty oil, particularly from the Arctic.

有什么不喜欢的？我们可以建立清洁能源经济。我们不应该投资肮脏的石油，尤其是来自北极的石油。

Well, the main idea here is to take some of the dirtiest oil on the planet, pipe it through the breadbasket of America so it can be sent overseas out of the Gulf of Mexico.

好吧，这里的主要想法是提取地球上一些最脏的石油，通过管道将其输送到美国的粮仓，以便将其从墨西哥湾运往海外。