Parsec
01
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
例子
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。
