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Light-year is an astronomical unit.是什么意思？

Light-year is an astronomical unit.

光年是一个天文单位。

相关词汇
is an astronomical unit

is

vt.& vi. 是（be的三单形式；n. 存在；

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

astronomical

adj. 天文学的，极大的；

unit

n. 单位，单元，装置，个体，[数]单位数；
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
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We had better treat it as a joke.
我们最好把它当作玩笑。
His arrogance comes out in every speech he makes.
他每次讲话都表现得骄傲自大。
Her smile looks artificial.
她的微笑很做作。
asseverate that it is true
断言它是真的
The new bill passed by Parliament has received Royal Assent.
议会所通过的新方案已获国王批准。
She associates herself with good company.
她和良友结交。
We talked about such subjects as the weather.
我们谈论了诸如天气之类的话题。
The first part of the ascent is not steep.
开始一段上坡路并不陡峭。
Her son was an energetic, assertive boy, always ready to argue.
她的儿子是个精力充沛而意志坚定的孩子, 时刻准备着争论。
We mistook assumption that the price would fall.
我们错误地认为价格会下降。
As you weren't there I left a message.
因为你不在那里, 我留了个信儿。
He flicked ash into the ashtray.
他把烟灰弹到烟灰缸里。
The donkey is a domesticated form of the African wild ass.
驴是非洲野驴的一种已驯化的品种。
He broke his arms in an accident.
他在一次事故中折断了手臂。