light-years
light-years — noun
1. a unit for measuring extremely large distances in space, equal to how far light
1.名詞B2
釋義
a unit for measuring extremely large distances in space, equal to how far light moves through empty space over one year
例句
The nearest star beyond the Sun is about four light-years from Earth.
pattern: [number] light-years from + place
Sayaka pointed to a map showing galaxies millions of light-years away.
Christopher read that the telescope can detect planets hundreds of light-years from us.
After the lecture, Mira understood how radio signals travel across light-years of space.
文法句型
[number] + light-years + from + place
[number] + light-years + away
[number] + light-years + across
用法筆記
Usually follows a number and often appears with 'from' or 'away' when giving the distance between stars, planets, or galaxies.
常見錯誤
❌It takes three light-years to get there.
✅It is three light-years away.
💡A light-year measures distance, not time.