Water was the main source of mechanical power, and by the end of the seventeenth century, England alone is thought to have had some 20,000 working mills.
水是机械动力的主要来源，而到了17世纪末，人们认为仅英格兰就有2万个左右的工作磨坊。
That's by design, because you don't want to end up in a situation where a problem at the plant cuts off its own power source.
这是故意的，因为你不希望出现因电站本身的问题导致了它自身电源被切断的情况。
The controller sends signals to the power source to move the robot arm to a specific position and to actuate the end effectors.
控制器负责发送信号给动力源并驱使机器人手到达准确的位置，激活终端操作机构的运行。
LED crystal lamp is a high-end interior lighting products, efficient use of energy saving high power LED as light source, the choice of natural crystal, made of quartz preparation.
LED水晶壁灯是一款高档的室内装饰灯具产品，采用高效节能环保的大功率LED为发光源，选用天然水晶、石英配制制作而成。
LED crystal lamp is a high-end interior lighting products, efficient use of energy saving high power LED as light source, the choice of natural crystal, made of quartz preparation.
LED水晶壁灯是一款高档的室内装饰灯具产品，采用高效节能环保的大功率LED为发光源，选用天然水晶、石英配制制作而成。
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