They calculate from the given factors such as weight, height, speed, engine power-the efficiency of a new aeroplane.
他们可以通过所给出的因素计算出一架新飞机的效能，这些因素包括飞机的重量，高度，速度和引擎功率。
Today our programme is about the first aeroplane with an engine.
今天的节目是讲关于第一架带有引擎的飞机。
Engine, heart of aeroplane, is motive power pushing aeroplane and aviation industry forward.
发动机是飞机的“心脏”，是推动飞机和整个航空工业蓬勃发展的源动力。
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