Nearly all computers contain a quartz-crystal clock to regulate their operation.
几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
The time base was given both by a crystal clock and the broadcast standard signals.
时间标准是由石英钟和广播标准信号提供的。
The precise clock source is crystal oscillator made of 74HC04;
高精度的时钟源是由74HC04构成的晶体振荡器；
The precise clock source is crystal oscillator made of 74HC04;
高精度的时钟源是由74HC04构成的晶体振荡器；
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