单词：middle piece of sperm cells
单词：middle piece of sperm cells 相关文章
A Piece of Cake ACT I I am exhausted. My new exercise class is so hard. 我太累了。我那里的健身班太难了。 Your new exercise class?你的新健身班？ Yeah. My new advanced exercise cl
2008年NPR美国国家公共电台二月
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
Researchers Use Brain Cells to Control Aging in Mice It is a question people have been asking forwell-- ages. Is there a way to turn back the aging process in people? For centuries, people have been looking for a fountain of youth. The idea is that i
2017年VOA慢速英语(八)月
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
今天我们要讲的两个习惯用语都是由mind这个字为主的。Mind就是指人的心，或者是一个人的想法或意见。现在我们来给大家讲解第一个习惯用语：to give s
美国习惯用语
to give somebody a piece of one's mind to tell someone off 你有没有因为十分生气而对别人大发雷霆？美国人有一个说法是形容这种情绪的，那就是：to give someone a pie
美国习惯用语
不知从何时起，在国外悄然兴起了一阵爸爸肚风，女人们不追求那些身材火爆的美少男，反而青睐那些大腹便便的中年男子。新研究发现，年长体胖的男性不但更讨女人喜欢，而且寿命更长，
实用英语
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
Paintable Solar Cells May Replace Silicon-Based Devices 可喷涂太阳能电池可能取代硅基电池板 Solar panels are manufactured in factories. Some of the devices are made with cadmium chloride, a substance shown to be harmful to human healt
2015年VOA慢速英语(十)月
Seraphic Fire made its debut a little over seven years ago. Classical music critic Greg Stepanich says it's become an essential part of South Florida's music scene - performing works from the Renaissance to the 21st Century. Every concert that they d
VOA标准英语2010年(九)月
Katie Melua凯蒂玛露19岁，俄罗斯人，成长于俄罗斯及英国。2003年底，首支单曲The Closest Thing To Crazy发行便强登英国金榜Top 10。不久，广获好评的首张专辑一举挤下英伦人气天后Dido/蒂朵、击退Norah Jones，荣获6周英国金榜后座，成为英国2004开春迄今最畅销专辑
音乐咖啡厅
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
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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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
Vienna at that time was a marvelous place for young musicians to go to. It has always been a city of pleasure or frivolity right back to the middle ages. The city was the most crowded city in Europe at the time. It had a population of probably around
英语听力：文化博览2008年
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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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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