Gas, typically found and exploited in the same sort of places as oil, is easily moved around through plumbing but is not, usually, seen as a transportation fuel.
天然气通常和石油在同类型的地方被发现和开采，通过管道很容易输送，但天然气一般并不被视为运输燃料。
Motorcycle, as a sort of convenient transportation tools, plays a very important role in human's everyday life.
摩托车作为一种便利的交通工具，在人们的生活中扮演着十分重要的角色。
Motorcycle, as a sort of convenient transportation tools, plays a very important role in human's everyday life.
摩托车作为一种便利的交通工具，在人们的生活中扮演着十分重要的角色。
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