ly background
BeDict Logo

ly

/laɪ/

Meanings
noun

光年

A unit of length (abbreviation ly; equal to just under 10 trillion kilometres (1016 metres)) equal to the distance light travels in one Julian year; used to measure extremely large distances.

Examples :

"Astronomers estimate that the galaxy is about 100,000 ly across. "
天文学家估计这个星系的直径大约是十万光年。
astronomy physics space unit science math

Related Words

Illustration measure

measure noun

/ˈmɛʒə/ /ˈmɛʒɚ/

衡量，措施

"The recipe calls for a precise measure of baking soda. "

这个食谱要求精确分量的烘焙苏打。

Illustration astronomers

astronomers noun

/əˈstrɑnəmərz/

天文學家

"Astronomers use telescopes to study planets and stars. "

天文學家使用望遠鏡來研究行星和恆星。

Illustration inventions

inventions noun

/ɪnˈvɛnʃənz/

发明，创造。

"Modern life is full of useful inventions, like smartphones and computers. "

现代生活充满了各种有用的发明创造，比如智能手机和电脑。

Illustration marathon

marathon noun

/ˈmæɹəθən/ /ˈmæɹəˌθɑn/

马拉松, 长跑

"My uncle ran in the city marathon last weekend. "

我叔叔上周末参加了在城市里举行的马拉松长跑比赛。

Illustration kilometres

kilometres noun

/kɪˈlɒmɪtəz/ /kəˈlɒmɪtəz/

千米，公里

"The marathon is a race of just over 42 kilometres. "

马拉松比赛的赛程略多于42公里。

Illustration trillion

trillion numeral

/ˈtɹɪljən/

万亿

"The national debt is in the trillions of dollars. "

国家债务高达数万亿美元。

Illustration extremely

extremely adverb

/ɪksˈtɹiːmli/

极其，非常。

"The weather was extremely hot today; we stayed inside all afternoon. "

今天天气极其炎热，我们整个下午都待在室内。

Illustration travels

travels noun

/ˈtɹævəlz/

旅行, 游历

"space travel"

太空旅行

Illustration distances

distances noun

/ˈdɪstənsɪz/ /ˈdɪstənsɪz/

距离, 路程

"From Moscow, the distance is relatively short to Saint Petersburg, relatively long to Novosibirsk, but even greater to Vladivostok."

从莫斯科出发，到圣彼得堡距离相对较短，到新西伯利亚路程比较长，但到符拉迪沃斯托克的路程就更远了。

Illustration distance

distance noun

/ˈdɪs.təns/

距离，路程。

"From Moscow, the distance is relatively short to Saint Petersburg, relatively long to Novosibirsk, but even greater to Vladivostok."

从莫斯科出发，到圣彼得堡的距离比较近，到新西伯利亚的距离相对较远，但到符拉迪沃斯托克的距离就更远了。

Illustration abbreviation

abbreviation noun

/əˌbɹiː.viˈeɪ.ʃən/ /əˌbɹi.viˈeɪ.ʃn̩/

缩写，简称.

""Mr. Smith always uses the abbreviation 'etc.' instead of writing out 'et cetera'." "

史密斯先生总是用缩写"etc."，而不是写出完整的"et cetera"。

Illustration estimate

estimate noun

/ˈɛstɨmɨt/

估计，估算。

"The estimate for the new school library project was $50,000. "

新学校图书馆项目的估算费用是五万美元。