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Tropical year, and sidereal year are two different concepts.是什么意思？

Tropical year, and sidereal year are two different concepts.

回归年与恒星年是不同的两个概念.

相关词汇
tropical year and sidereal are two different concepts

tropical

adj. 热带的，炎热的，热情的；

year

n. 年，年纪，一年的期间，某年级的学生；

and

conj. 和，与，而且，于是，然后，因此；

sidereal

adj. 星的，根据恒星测定的；

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

two

n. 两个，两个东西，两点钟，一对；adj. 两个的，我

different

adj. 不同的，各式各样的，个别的，不平常；

concepts

n. 概念( concept的名词复数 )，观念，想法，总的印象；
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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。
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。
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。
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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鞋上的擦痕很难除掉。
The scion is then securely placed into a cut on the rootstock.
然后将接穗插入砧木切口紧密贴合.
The scud had banked over the moon, and it was now quite dark.
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hair with a healthy sheen
闪着健康光泽的头发
Satin has a sheen.
缎有一种光泽.
Don't hang around that shiftless guy. You don't know what he will do.
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这个产量跟好吃懒做的斯莱特里家比也好不了多少.
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他是个登徒子。
These latter, therefore, represent'sibling species'such as have been described in other organisms.
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你的思想是轻灵得如同天使一般的。
He was shattered and bewildered by this trenchant criticism.
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Placido Domingo sang his serenade of love.
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