The helicopter, named GEN H-4, has a set of two rotors turning in opposite directions and can fly at a maximum speed of 50 kilometres (31 miles) per hour.
这架代号为GEN H - 4的直升机有两个向相反方向旋转的旋翼，最高飞行速度可达每小时50公里。
The speed is then about 425 miles per hour so the horizontal component 300mi/h and the vertical component is also 300.
假定速度为425英里/时,那么水平分量,就是。
Just walk, at a reasonably vigorous clip (3 m. p. h. - 4 m. p. h.) for half an hour or so, maybe five or six times a week.
就以适度有力的步伐(每小时3 ~4英里)走上半个小时左右，每周五六次。
Awkwardness with a cabby was the least of my concerns when a taxi I was in recently started lurching forward at 100 kilometers per hour (62 m. p. h. ), more than triple the road's speed limit.
近日，我乘坐的一辆出租车超过道路限速两倍有余，开始以上百公里的时速狂奔。 到了这时候，与司机之间是否气氛尴尬几乎不在我担心的事情之列。
Awkwardness with a cabby was the least of my concerns when a taxi I was in recently started lurching forward at 100 kilometers per hour (62 m. p. h. ), more than triple the road's speed limit.
近日，我乘坐的一辆出租车超过道路限速两倍有余，开始以上百公里的时速狂奔。 到了这时候，与司机之间是否气氛尴尬几乎不在我担心的事情之列。
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