Slower cruising — at about Mach 0.7, or seven-tenths the speed of sound, which is 5 percent to 10 percent slower than today's aircraft — and at higher altitudes, to save fuel.

更低速的巡航——大约0.7马赫，即音速的十分之七，比今天的飞行器低5 - 10%——并且飞行于更高海拔以节约燃油。

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It is shown that the climbing control plan is applicable to the aircraft with slower climbing according to optimum performance trajectory and automatically fly with optimum cruising velocity.

经分析计算与试飞结果表明，对于爬升较缓慢的飞机，本控制方案可实现沿优化性能轨迹上升，并自动转入有利速度巡航。

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Unless Secretary Aspin reverses the present so-called "Dual Track" procurement strategy for the V-22, the end result will be an aircraft which is slower and has less range than it could easily have and than it needs to perform the panoply of joint service missions for which it is required.

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An aircraft flying at a faster speed consumes more fuel per distance than the same aircraft flying at a slower speed.

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Indeed, it is a slower speed that enables such an aircraft to be so quiet: it would drift in to land rather than powering in, all engines blazing, as today's jets do.

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