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造父变星是一种光线按规律周期发生变化的恒星.用英语怎么说？

造父变星是一种光线按规律周期发生变化的恒星.

Cepheid variable stars are stars whose brightness changes at regular periods.

相关词汇
cepheid variable stars are whose brightness changes at regular periods

cepheid

造父变星；

variable

adj. 变化的，可变的，[数]变量的，[生]变异的；n. 可变因素，变量，易变的东西；

stars

abbr. specialized training and reassignment students 经过专门训练后再分配的学生，stationary automotive road stimulator (Toyota) 汽车公路固定刺激物（丰田汽车）；n. 星( star的名词复数 )，明星，（尤指旅馆或餐馆的）星级，星象（根据人出生时天体的位置而描述的命运）；

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）；

whose

pron. 谁的，那个人的，那些人的，他的，他们的；

brightness

n. 亮度，明亮，光泽度，灯火通明；

changes

n. （会令人感兴趣或可喜的）变化( change的名词复数 )，换车，辅币，变迁；

at

prep. （表示位置）在，在（某时间或时刻），以，达， 向，朝；n. 阿特（老挝辅币单位，100 阿特 = 1 基普）；

regular

adj. 有规律的，规则，整齐的，不变的，合格的；n. 正规军，主力（或正式）队员，常客；adv. 定期地，经常地；

periods

n. 周期，时期( period的名词复数 )，（一段）时间，学时，句号；
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。
相关例句
Television companies tend to censor bad language in feature films.
电视公司往往会在审查故事片时删去其中的粗话。
The civil war reinforced the centrifugal tendencies at work within the economy.
內战加剧了经济领域的离心倾向.
The blades at its periphery throw off air centrifugally in a direction following the rotation.
轮周叶片将空气沿着转动方向抛离轴心.
Objective : To assess the usage of color doppler monitoring method in the centesis of kidney cysts.
目的: 探讨和分析彩色多普勒监测在肾囊肿穿刺治疗的应用.
The advances in the process technology for the enzymatic synthesis of cephalexin are reviewed.
综述了酶法合成头孢氨苄的工艺方法研究进展.
Menstruum crystal is widely used in cephalosporin production in view of its stability and high purity.
溶媒结晶由于其稳定性和纯度高被广泛用于头孢菌素生产中.
This initial layer, formed of both cellulosic and noncellulosic materials, is called the primary wall.
这头一层由纤维素和非纤维物质构成, 被称作初生壁.
His dishonest behaviour came under severe censure.
他的不诚实行为受到了严厉指责.
Centaury eases cough, bronchitis, inflammation of liver and eye.
咳嗽 、 支气管炎 、 肝脏及眼睛发炎有抑制功效.
The juice is extracted by centrifugal force.
果汁是通过离心力榨取的。
The news reports had been heavily censored .
这些新闻报道已被大幅删剪。
He was insufferable at times — self-centred and narcissistic.
他有时让人难以容忍——自我中心，自我陶醉。
Cefadroxil is important as an cephalosporin antibiotic.
头孢羟氨苄是重要的头孢类抗生素.
The greatest polemicist of the 20th century must be Leon Trotsky.
20世纪最了不起的辩论家非列昂·托洛茨基莫属。