英语语法分析

It is hourglass-shaped.

它是沙漏形的。

At night, the sand in the hourglass has run through twelve times.

晚上，沙漏里的沙子已经流了12次。

Thus time and time's relativity are measurable by any hourglass, alarm clock, or atomic clock that can measure a billionth of a second.

因此，时间和时间的相对性可以用任何沙漏、闹钟或原子钟来测量，其中原子钟可测量出十亿分之一秒。