We observe that in the case of ideal voltage sources, equation required for the node method breaks down . 我们注意到在存在理想电源的情况下，节点分析法的方程就失败了。
In this technique two cells as nearly identical as possible are coupled together with a common applied voltage source . 这时，把两个尽可能一样的电池和一个共同的外加电源相连。
Utilities required are only those necessary to heat the sealing compound and any power that might be required to drive the small motor of the acid filling machine . 所需要的辅助设备只包括加热封口剂所必须的那些设备以及带动注酸机的小电机的电源。
The electric leads to the motor, add in some cases to the pickoffs and torquers, must often be carried through a hermetically sealed gyro case . 通向马达的电源导线，以及在某些情况下通向信号传感器和力矩马达的电源导线，常常必须经过密封的陀螺壳体。
The electricity in the past three hours 在过去的几个小时里，电源被切断了三次。
First you plug it in . then you adjust the power 首先把插头插上，然后调节电源。
As a long - term power source for deep space probes 试图用于宇宙探测器的长期电源
Aerospace ; power supply for anti - collision beacon 航空航天.防撞警告信号用的电源
Indicates current system power status information 指示当前的系统电源状态信息。
I turn on a switch but the light had burnt out 我打开电源，但电灯已经烧坏了。
