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。

And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.

youdao

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。

And so we can use the spin rate, the rotation rate of a star, as a clock to measure its age.

youdao