The vertical flight profile was assumed to have three flight segments climb, cruise and descent.

飞机纵向飞行剖面被假定分为三个飞行段：爬升、巡航和下降；

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The vertical flight profile was assumed to have three flight segments climb, cruise and descent.

飞机纵向飞行剖面被假定分为三个飞行段：爬升、巡航和下降；

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