Unlike, say, an electric milk float, EVs are astonishingly silent, with just the wheel rumble and an occasional electric whine to alert you to their approach.
与像电动牛奶车之类的不同，电动车行驶起来出奇地安静，只听得见车轮的辘辘声，还有就是偶尔提醒你前方障碍物时所发出的电动呜呜声。
Maglev is short for magnetic levitation 1 , which means that these trains float over a guide way using the basic principles of magnets to replace the old steel wheel and track trains.
磁悬浮简要地说是磁性悬浮，意思是这些列车是漂浮在应用磁性原理的一条引导线路上，替代老式的钢铁车轮和轨道列车。
By controlling the process parameters, the hollow wheel gear may be caused to rotate in the media and can be made to float at a desired level.
通过控制所述过程参数，可以使所述空心齿轮在所述介质内旋转，并且能够使所述空心齿轮浮于所需的层面上。
By controlling the process parameters, the hollow wheel gear may be caused to rotate in the media and can be made to float at a desired level.
通过控制所述过程参数，可以使所述空心齿轮在所述介质内旋转，并且能够使所述空心齿轮浮于所需的层面上。
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