The counter output, which represents a binary number, decreases by 1 any time the counter is triggered by a pulse .
每当计数器被时钟脉冲触发一次时，计数器输出的二进制数便累减1。
This can be easily done by nothing that, for a binary counter, any given digit changes its value (from 1 to 0 or from 0 to 1) whenever all the previous digits have a value of 1.
这很容易做到，注意，对于二进制计数器，只要所有前面的数字都是1，任何给定的数字都会改变它的值(从1变为0，或者从0变为1)。
This can be easily done by nothing that, for a binary counter, any given digit changes its value (from 1 to 0 or from 0 to 1) whenever all the previous digits have a value of 1.
这很容易做到，注意，对于二进制计数器，只要所有前面的数字都是1，任何给定的数字都会改变它的值(从1变为0，或者从0变为1)。
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