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。

youdao

A nanosecond is one-billionth of a second.

1纳秒为十亿分之一秒。

youdao

This anomaly, which breaks the laws of physics, lasted a billionth of a billionth of a billionth of a second.

这种打破了物理定律的不正常现象持续了十亿分之一秒的十亿分之一的十亿分之一。

youdao

It does so quickly within a ten-billionth of a second of its creation.

ECONOMIST: What��s the matter?

It can then release the light it absorbs in quick bursts that last a few femtoseconds each (with one femtosecond lasting one millionth of one billionth of a second), which is what ultrashort-pulse lasers do.

ENGADGET

We call this new imaging technology femto photography because we capture a segment of the image with a flashlight (in this case, a laser pulse) on for a few millionths of a billionth of a second (or a few femtoseconds) and an exposure time approaching a trillionth of a second.

CNN: A camera that can see around corners