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1·The nearest star to earth is about 4 light years away.

地球离最近的恒星大约为4光年。《牛津词典》

2·This law is known to hold true for galaxies at a distance of at least several billion light years.

这个定律被普遍认为同样适用于至少数十亿光年之远的星系。《柯林斯英汉双解大词典》

3·It can see objects about 13.7 billion light years away.

它可以看到137亿光年以外的物体。

4·However, Gliese 581g is twenty light years from the Earth.

然而，Gliese 581g 距离地球20光年。

5·That means that our nearest neighbours are perhaps 100 light years away, which is almost next door in astronomical terms.

那意味着我们最近的邻居星球离我们大约有100光年远，从天文学的角度来说，这几乎是一墙之隔。

6·The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep.

第一个是一对质量与木星差不多的行星，这对行星步调一致地围绕距离地球15光年的母恒星旋转。

7·The stars being searched are hundreds of light years away, so it takes hundreds of years for their signal to reach us, and a further few hundred years for our reply to reach them.

被搜寻的星星离我们有几百光年远，所以它们的信号传到我们这里需要几百年，而我们的答复传到它们那里又需要几百年。

8·Full employment still seems light years away.

充分就业好像依然是遥遥无期。《牛津词典》

9·She says the French education system is light years ahead of the English one.

她说法国的教育体制远比英国的先进。《柯林斯英汉双解大词典》

10·James Salter: Light Years (1975).

詹姆斯·索尔特：光年(1975)。