单词：tail structures of sperm cells
单词：tail structures of sperm cells 相关文章
Health Report - A Way to Make New Eggs in Women? 健康报道 - 产生新卵子的新途径 This is the VOA Special English Health Report. 这里是美国之音慢速英语健康报道。 New research could raise hope for women who are having trouble
2012年VOA慢速英语(二)月
Best of Megastructures 伟大工程巡礼之最 by Kevin Lustig In the last 100 years, 11 different skyscrapers have held the title of world's tallest building. With improvements in technology and materials, humans are pushing the limits of what buil
常春藤解析英语
Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On this Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm an
英语听力广播—Listening
说一口流利的英语，从简单的单词开始。 听听，读读，背背，今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 tail [ tei ] The police have been tail
每日攻克5词
Egg Cells 卵细胞 Do you know what an egg cell is? 你知道什么是卵细胞吗？ An egg cell is necessary for reproduction. 卵细胞是繁殖的必要条件。 Animals have egg cells. 动物有卵细胞。 Then does every animal have egg cells
与美国小学生一起学英文第10册
Why are there males and females? Why are there two sexes instead of three, or twelve, or one? On todayss Moment of Science we'll learn why two is the magic number. Let's start with why there is sex at all. When two organisms reproduce sexually, sperm
英语听力文摘 English Digest
Science and Technolgy. 科技。 reproduction. 人类繁衍。 Life begins at 45. 45岁也能生娃。 Hope for older mothers. 高龄母亲的福音。 WHEN it comes to reproduction, men have it easy. Almost to the end of their lives most have an amp
经济学人科技系列
26 茎细胞对于疾病治疗的神奇功效 DATE=5-24-01 TITLE=SCIENCE REPORT - Progress in Stem Cell Research BYLINE=Caty Weaver （Start at 59
自然探索
近日，《科学》杂志在线报道称，剑桥大学的科学家们通过使用两种干细胞以及一个三维支架，成功地创造出了一个能够自行组装的结构，其发育和构造非常接近自然的小鼠胚胎。科学家的研
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Air France tail section recovered 法航飞机尾部复原 A Brazilian search team has recovered a large tail section of the Air France jet that crashed a week ago over the Atlantic with 228 people on board. The Brazilian military released photos of divers
英语新闻
The Fox Who Had Lost His Tail A FOX caught in a trap escaped, but in so doing lost his tail. Thereafter, feeling his life a burden from the shame and ridicule to which he was exposed, he schemed to convince all the otherFoxes that being tailless was
英语美文
今天我们要学几个有turn这个词的习惯用语。Turn是个很普通的词。它当动词的时候意思就是转动。我们要学的第一个习惯用语是: turn tail。 Tail是尾巴，猫或狗在面临什么威胁的时候，往往会调
美国习惯用语
我们今天要学的习惯用语都围绕一个关键的词: bear。我们要学的第一个习惯用语是: have a bear by the tail。bear是大家熟悉的动物。它粗大笨重而且性情暴烈。在荒山野林碰上大熊你一定会赶快躲得
美国习惯用语
Beijing, Sept. 6 (Xinhua) -- A sperm donation scandal disclosed recently has aroused growing concern in the United States. According to the New York Times' report, Ryan Kramer, the son of a donor, found that he has more than 150 half-siblings - they
英语新闻
WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo
英语新闻
Science and technology 科学技术 Human reproduction 人类繁衍 Life begins at 45 45岁也能生娃 Hope for older mothers 高龄母亲的福音 WHEN it comes to reproduction, men have it easy. 讲到繁衍，男人表示压力很小。 Almost to
经济学人科技系列
Scientists say early experiments suggest it may one day be possible to make babies without using eggs. 科学家称，早期实验表明，将来某一天或许不需要卵子就能孕育出婴儿。 They have succeeded in creating healthy baby mice
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Such is the subtle elasticity of the organ I treat of, that whether wielded in sport, or in earnest, or in anger, 这就是我要谈的那个有微妙的伸缩力的器官，不管它在挥舞时是开玩笑，或是一本正经，还是发脾气，
白鲸记
For d'ye see, rainbows do not visit the clear air; they only irradiate vapor. 因为，你知道，晴朗的天气决不会有虹彩；虹彩是专为照耀雾气才出来的。 And so, through all the thick mists of the dim doubts in my mind, 因此，
白鲸记
Nor did the procedure fulfil any unmet medical need. 此程序也未能满足任何未知医疗需求。 For the child whose genome was edited to confer resistance, the claimed benefit is protection from a virus that she may never encounter 对于为产
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