我非常喜欢李连杰。 我是李连杰的超级影迷。
One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.
提高高旁通飞机引擎的方法之一就是把风扇变成开放式旋翼,有点回归于螺旋桨的味道,但要使用两圈粗短的反旋桨叶。
Whereas jet engines were long and slim in the 1960s, today they have a vast opening at the front containing a giant fan.
60年代的喷气式飞机引擎又长又细,而今天它们的前端有了一个硕大的开口,巨大的风扇包含其中。
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