And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.
因此，我们可以用星星的自转速度及速率作为衡量它们年龄的计时器。
Brains were thought to measure time by using some kind of internal clock that generates events at a relatively regular rate.
据认为，用大脑里所谓的内置时钟——用相对规范的速率来衡量事物——计算时间。
SCSI-1 defined an 8-bit parallel interface with a 5MHz data clock, providing a maximum data transfer rate of 5 megabytes per second (MB/s).
SCSI-1 定义了一种具有 5MHz 数据时钟的 8-bit 并行接口，能提供最高 5 兆字节每秒（5 MB/s）的数据传输速率。
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