信号

• The signal consists of surges of electrons or electric current .
  该信号是由电涌即电流所组成。
• The voltage of the amplified signal at the loudspeaker is 2v .
  扬声器放大了的信号的电势为2伏。
• Seismic signals are stored digitally in binary code .
  地震信号是以二进制编码的数字形式储存的。
• Table 3-25 is a truth table of the 8251 bus control signals .
  表3-25是8251总线控制信号的真值表。
• In an asynchronous system, an acknowledge must be generated .
  在异步方式中，则必须发出应答信号。
• The indication given by a signal is known as the signal aspect .
  信号所发出的灯色，称为信号方式。
• We are using this transistor to amplify a telephone signal .
  我们正在使用这种晶体管来放大电话信号。