light-year

英式音标：['laɪt'jɪr]

美式音标：['laɪt'jɪr]

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概况：

n. 光年

词义：

n.

光年；

英英释义

light-year[ 'laitjə: ]

n.the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers

同义词：light year

用法：

双语例句

用作名词(n.)

The distance can be expressed in light years.
距离可以用光年表示。

A place that requires one year for light to reach is one light year distant from us.
因此光需要一年时间才能到达的地方离我们也就是一光年的距离。

权威例句

Light Year

Light-Year

Light-Year

Light-year Scale Radio Cores in Four LINER Galaxies

Indianapolis courts making light-year leap to e-filing

Alien star passed within a light-year of Sun just 70 000 years ago

MP3 David Pritchard - Light-year

The Origin of the 30 and 18 Million-Light-Year Separation of Single Galaxies and Clusters of Galaxies in the Filamentary Cosmic Netw...

Galaxy Charts: The 1,000-Light-Year View of the Data

Binary star, Constellation, Eridanus (constellation), Light-year, Double star, James Dunlop

Extrasolar planet, Light-year, Constellation, Ara (constellation), Star, HD 154857

Deep in the Hundred-Light-Year Wood

Million-light-year galaxies and spectral forests

造句：

1. A light-year is the distance light travels in one year at a speed of 299,792 kilometers per second.

一光年是光以每秒299792公里的速度在一年中所走过的距离。

-- 来源 -- 英汉 - 辞典例句

2. It is over 4 light-year away from earth.

它距地球4光年多。

-- 来源 -- 天宝物华（上） - Stars: How Far? How Big?

3. The observable universe grows by a light-year every year as light from farther away has time to reach us.

可观测宇宙的範围，会因来自更远处的光线到达我们这里而每年向外长大一光年。

-- 来源 -- 网友提供

4. Astronomers use light-year to talk about distance in space.

天文学家用光年表示宇宙空间的距离。

-- 来源 -- 天宝物华（上） - Stars: How Far? How Big?

5. The visible universe contains at least10100 bits of entropy, which could in principle be packed inside a sphere a tenth of a light-year across.

整个可见宇宙起码含有10100位元的熵，这麽多的熵原则上可以塞进直径为1/0光年的圆球内。

-- 来源 -- 210.71.44.154

6. A light-year is the distance light travels in one year.

一光年是光运行一年所走的距离。

-- 来源 -- 天宝物华（上） - Stars: How Far? How Big?

7. A light-year is about 6 trillion miles, the distance light travels in a year.

一光年大约6百亿亿英里，即光行走一年的距离。

-- 来源 -- 网友提供