The light year is a unit of distance.

光年距离的单位。

As a unit of distance, it's convenient for astronomers, but it's a terrible one if you're doing the Kessel Run.

它对天文学家来说很方便的距离单位，但如果你在做凯塞尔航行，它就很糟糕。

A light year is a unit of distance not time.

光年距离单位而不时间单位。

Traditional units of distance such as the Iranian Parasang reflected how a person could walk in a certain amount of time.

传统的距离单位，如伊朗的帕勒桑，反映的人在定时间内走的路程。

Scientists call this distance one astronomical unit, or AU.

科学家们将这距离定为天文单位，或缩写为 AU。

They use a distance called the parsec (a contraction of parallax and second), based on a universal measure called the stellar parallax and equivalent to 3.26 light-years.

他们用的距离单位“秒差距”基于种普遍使用的、名叫恒差的量度方法，相当于3.26光年。

You scoff, remembering that a parsec is a unit of distance, not time, when suddenly your ship powers down and a boarding party is beating down the outside hatch.

你嗤之以鼻， 记住秒差距距离单位，而不时间，突然你的船停电了， 登船队正在敲打外面的舱口。