That distinguishes them from synchronous motors that use a permanent magnet in their rotors instead of a set of aluminium or copper conductors .
这就把它们和在转子处使用永磁铁而非一套铝或铜导体的同步发动机区分开来。
Wallis said : " they are one of the safest machines to fly because , if the engine stops , the rotors keep turning and you can land . "
沃利斯称:“驾驶旋翼飞机很安全,即使引擎停转,旋翼还会继续转动,所以可以安全着地。”
He identified an enhanced vertical mixing of warm and cool air in the atmosphere in the wake of the turbine rotors .
他发现随着风轮转子的转动大气中的冷暖空气产生强大的垂直方向上的混合。
That is why the finance ministry 's 20 billion yuan offering got everybody 's rotors beating .
这就是为什么财政部发行的200亿元国债让所有人激动不已。
From the veranda of his farmhouse on the outskirts of this isolated riverside settlement , gilvan onofre can hear the helicopters coming , their rotors slicing through the humid amazon air .
When the engine fails , an alarm will sound and the rotors will begin to spin down . You cannot let them spin down , else you 'll crash and burn hard .
当发动机失效时,飞行会旋转着掉落并发出警告,你必须采取措施,否则就会坠毁。
The officers open the trunk of their patrol car and pull out what looks like a toy model aircraft with four rotors and a video camera .
警官随即打开巡逻车的后备箱,掏出一个类似玩具模型带有摄像头的四轮飞机器。
Advanced computer modelling has also made it possible to design more efficient rotors .