Bits have a physical size-they are nothing more than electrical, radio or light pulses.
位元其实就是电脉冲、线电脉冲或是光脉冲，具有实际的尺寸。
Pulses of light can bleed together, adding noise and degrading the signal.
脉冲光会跟着一起散开，并会渗入噪音并使信号损失。
Pulses of light can bleed together, adding noise and degrading the signal.
脉冲光会跟着一起散开，并会渗入噪音并使信号损失。
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