They were a major milestone in the air force's attempts to develop an alternative to JP-8 aviation fuel, of which it is the largest consumer in the world.
他们在空军尝试开发世界上消耗量最大的JP-8航空燃料的替代品方面，具有重要的里程碑式的意义。
They were a major milestone in the air force's attempts to develop an alternative to JP-8 aviation fuel, of which it is the largest consumer in the world.
他们在空军尝试开发世界上消耗量最大的JP-8航空燃料的替代品方面，具有重要的里程碑式的意义。
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