求翻译：当气温降低时，空冷电机的转速降低，有明显的节电效果，据测试，当转速降到正常转速的50%时，用电量仅是正常转速的三分之一。是什么意思？

When the temperature decreases, the air-cooled motor speed is reduced, there are significant energy-saving effect, according to the test, when the speed dropped to 50% of normal speed, power consumption is only one-third of normal speed.

When the air temperature decreases, air cooled motor rpm lower, there is clearly a power-saving effects, according to tests, when speed reduced to normal speed 50% of normal speed of 9.47 is only 3.

正在翻译，请等待...

When the temperature decreases, the air cooled motor speed reduction, there is an obvious power-saving effect, according to the test, when the speed drops to normal speed 50%, electricity consumption is normally one-third only.

When reducing in temperature, the rotational speed of the empty cold electrical machinery is reduced, there is obviously effect of economizing on electricity, according to testing, when the rotational speed drops to 50% of the normal rotational speed, the power consumption is only 1 3 of the normal