Greenhouse gas emissions of tar sands crude are 40% higher than conventional oil, and the open-pit mining has devastated Alberta's boreal forest.
焦油砂的温室气体排放量比普通石油高40%，露天采矿已经极大地破坏了阿尔伯塔的北方气候带森林。
Even if no random event rises from a tar pit somewhere, investors say they are worried about three issues, which center on the wounded American consumer, China and the Federal Reserve.
即便没有“天降大事”于股市，投资者表示有三个让他们焦虑的问题，主要集中在受创的美国消费者、中国和美联储。
The pit cover should be sealed over with tar paper or plastic.
顶盖必须用焦油纸或塑料封闭。
The pit cover should be sealed over with tar paper or plastic.
顶盖必须用焦油纸或塑料封闭。
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