对于一种特定燃料来说，汽车排放的二氧化碳量与所使用的燃料的质量是成比例的。
For a given type of fuel the CO2 emissions of a car are directly proportional to the quantity of fuel consumed.
燃料是决定汽车产业未来的一个主要因素，在某个特定国家甚至决定人们的生活质量。
Fuel is one of the main factors determining the future of the motor industry and the quality of life in a specific country.
该低污染的飞机可以搭载50到100名乘客，起飞时飞机使用从海藻中提炼的生物燃料驱动的常规引擎，当爬升到特定高度时，飞机会切换到火箭引擎。
The low-pollution plane to carry between 50 and 100 passengers will take off using normal engines powered by biofuel made from seaweed before switching on its rocket engines at altitude.
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