NextGen will allow planes to make what is called a continuous-descent approach (CDA), essentially letting them turn off their engines, saving tons of fuel and reducing pollutants.
次世代可允许飞机采取被称国持续降落进场（CDA）的动作，从而事实上关闭引擎，节约燃料，减少污染物排放。
In addition, the nitrogen rich gas is used for fuel tank pressurization during descent.
另外，在飞机降落过程中，富氮气体还可用于。
Furthermore, an attainable set for initial conditions of the gravity-turn descent is deduced according to the constraints of thrust, fuel and states of the soft landing system.
此外，根据软着陆系统推力、燃料和状态的约束条件，给出了引力转弯着陆过程初始条件的可达集合。
As much as America's descent into recession helped kill the commodities rally in 2008, it is worth remembering that the big run-up in oil prices from 2005 onward took place while fuel demand in the u.
同美国陷入衰退扼杀了2008年大宗商品的上涨一样，应该记住的还有2005年以后油价的飙升发生在美国燃料油需求不断下降之际。
As much as America's descent into recession helped kill the commodities rally in 2008, it is worth remembering that the big run-up in oil prices from 2005 onward took place while fuel demand in the u.
同美国陷入衰退扼杀了2008年大宗商品的上涨一样，应该记住的还有2005年以后油价的飙升发生在美国燃料油需求不断下降之际。
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