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A cow's estrus cycle averages 21 days.是什么意思？

A cow's estrus cycle averages 21 days.

母牛的发情周期平均为21天.

相关词汇
estrus cycle averages days

estrus

n. 动情期，动情周期，发情；

cycle

n. 循环，周期，自行车，时代，一段时间，整套；vi. 周而复始，循环，骑自行车，轮转；vt. 运转，循环，使轮转；

averages

n. 平均水平( average的名词复数 )，（速度等的）平均率，平均估价；

days

n. 天，时期，一天( day的名词复数 )，白天，时期，工作日；adv. 每天，在白天；
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。
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。
相关例句
You should not, of course, stop reading this estimable newspaper.
当然, 你不应该抛弃这份宝贝的报纸.
The escapee's turnup is expected soon.
预料很快就会出现逃亡者.
Here, from a window, did Guinevere espy a knight standing in a woodman's cart.
吉尼维尔是从这里透过窗户看到了站在樵夫车上的骑士。
He examined the ads in " The New Yorker " and " Esquire. "
他翻阅了《纽约人 》 和《绅士 》 杂志上的不少广告.
J . B . Priestley ( 1894 -- 1984 ), British novelist, playwright, and essayist.
K约翰-伯因顿-普里斯特利 ( 1894-1984 ), 英国小说家, 剧作家和散文家.
The acid ewolises nearly as well as the ester.
此酸的烯醇化几乎象酯一样良好.
Others claim that Ireland's very essence is expressed through the language.
其他人声称爱尔兰最精髓的东西是通过语言表现出来的。
Nor could she devour them by any escapade of a less legitimate description.
她也不能通过任何不大合法的自由放荡行为来吞没他们.
In July of that year an Estonian army, under General Yudenitch, almost got to Petersburg.
同年7月,尤得尼奇率领的一支爱沙尼亚军队几乎打到了圣彼得堡.
The site is available in English, Fran & ccedil ; ais , and Espa & ntilde ; ol.
该站点除英语版外, 还有 法语 版 和 西班牙语版.
He said he retained immense regard and esteem for the prime minister.
他说他一直极其尊重和敬仰首相。
Method: 72 cases of alternating esotropia were divided into symmetrical surgery group and asymmetrical surgery group.
方法: 对72例交替性内斜视采用相同检查方法,一组给同等量内直肌后徙术,另一组给不同量内直肌后徙术.
We are in esse.
我们存在着.
They complained that they had been trapped inside the police station, but in fact most were seen escaping over the adjacent roofs to safety in nearby buildings.
他们抱怨说被困在了警察局里，但实际上，有人看见他们大多数人通过毗邻的屋顶，安全地逃到了附近的建筑物内。