par
sec
复数形式
parsecs
1
秒差距, 天文距离单位，约等于3.26光年
a unit of astronomical distance equivalent to about 3.26 light-years
- Astronomers use parsec to measure distances to stars and galaxies.
天文学家使用秒差距来测量到恒星和星系的距离。
- The Milky Way galaxy has a diameter of tens of thousands of parsecs.
银河系的直径有数万秒差距。
- Galaxies billions of parsecs away are visible with powerful telescopes.
数十亿秒差距之外的星系可以用强大的望远镜看到。
- Understanding parsec helps astronomers map the vastness of the universe.
理解秒差距有助于天文学家绘制宇宙的广阔。
- Parsec provides a convenient scale for discussing interstellar and intergalactic distances.
秒差距为讨论星际和星系间距离提供了方便的尺度。
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