signal

• What acquaintance was that you were making signals to ?
  你招呼的是哪个相识的人啊？
• No signal means the solenoid is not energized .
  没有信号，意味着电磁阀没有通电流。
• Television signals can only be beamed in straight lines .
  电视讯号只能以直线发射。
• May i signal him to come ?
  我做手势请他过来，可以吗？
• Even a mighty express train can be held up by signals .
  即使特别快车也能被信号阻拦。
• This is the signal instance .
  这就是一个明显的例证。
• It will delay the start signal for six clock periods .
  它将起始信号延迟六个小时周期。
• Pneumatic signals will travel only at sonic speeds .
  气动信号的传输速度仅仅相当于音速。
• The signal for assistance was five shots in quick succession .
  求援的暗号就是连发五枪。
• "my signal says nine. "
  “我接到的通知是九个”。