Mean Time Measurement

• 平均时间测量

Mean Time Measurement的用法和样例：

例句

1. The most precise measurements of time are nowadays based on atomic phenomena.
   现在最精确的时间测量是依据原子现象。
2. And what refinements did the Egyptians make to time measurement to give us the system we still use today?
   埃圾人在时间测量方面做了哪些改，才留给了我们至今仍在使用的方法。