When they brought the clocks together and made a comparison, the clock on the plane was indeed a few nanoseconds slower than the other clock.
当他们将两个时钟拿到一起比较时，飞机上的时钟确实较另一只慢了几毫微秒。
The modern Metro does the same, arriving exactly when the overhead clock says it will, making my home system (New York) seem rickety and archaic by comparison.
与此处相比，我的家乡纽约的系统看起来是如此的摇摇欲坠和过时。
When they brought the clocks together and made a comparison the clock on the plane was indeed a few nanoseconds slower than the other clock.
当他们将两个时钟拿到一起比较时，飞机上的时钟确实较另一只慢了几毫微秒。
A phase comparator compares the phase of the reference clock with that of the output clock and outputs a phase comparison signal.
相位比较器比较基准时钟和输出时钟的相位，并输出相位比较信号。
A frequency comparator compares the frequency of a reference clock with that of an output clock and outputs a frequency comparison signal.
频率比较器比较基准时钟和输出时钟的频率，并输出频率比较信号。
A frequency comparator compares the frequency of a reference clock with that of an output clock and outputs a frequency comparison signal.
频率比较器比较基准时钟和输出时钟的频率，并输出频率比较信号。
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