开关

• She picked up the microphone and began to experiment with the switches .
  她拿起话筒，试拨开关，看是否灵验。
• On the front of the cabinet are on-off switches for sample-feed pump .
  在箱子的正面有试样进料泵的电源开关。
• When the engine is running, the solenoid is connected to the battery .
  当发动机运转时，电磁开关与蓄电池接通。
• Suppose the switch in the diagram is suddenly closed in the "up" position .
  假设图中的开关突然闭合到“上”方。
• The cruise control switches are conventionally mounted on the steering column .
  巡游控制开关按常规安装在转向轩上。
• The cruise control switches are conventionally mounted on the steering column .
  巡游控制开关按常规安装在转向杆上。
• This fact enables the supply to be turned off as required by a switch .
  这就使我们在需要断电时就能用开关切断电源。
• Mechanical switching is inherently slow and frequently unreliable .
  机械开关速度有一种固有的缓慢性，而且经常不可靠。
• One felt even more shut in when to open a door or window was a major operation .
  如果你每天的活动仅限于开关门窗的话，你就会倍感与世隔绝。
• You switch on , wait until the screen turns green , push in the disk and there you are !
  你打开开关，等屏幕变成绿色，把磁盘推进去就行了！