原生殖细胞;原始生殖细胞

primordial germ cell的用法和样例：

例句

It was found the number of primordial germ cells in the blood and gonads decreased significantly, the histological structure of some organs in quail embryos had different changes.本实验利用回转器旋转模拟微重力的生物效应，以鹌鹑胚胎作为实验材料，研究了鹌鹑胚胎生殖腺内原始生殖细胞的数目及内脏器官的组织学变化。

用mp3背四级单词27

gallery -画廊,美术馆 gallon -加仑 gang -(一)帮,(一)伙 gap-缺口,间隙 garbage -垃圾,废物 gardener-园丁 garlic -大蒜 gas -气体,煤气 gasoline -(美)汽油 gaze-凝视,注视 gear -齿轮装置 gene -基因 generally -一般地,通常 generate-生成,产生,引起 generator -发

发表于:2018-11-29 / 阅读(153) / 评论(0)

用mp3背四级单词

创新英语-Shopping Carts Covered in Bacteria

A new study into the hygiene of supermarkets has found that shopping carts are dirtier than the stores bathrooms. Microbiologist Dr Charles Gerba of the University of Arizona conducted research on the handles of 85 carts in four American states. He r

发表于:2018-12-07 / 阅读(113) / 评论(0)

创新英语

Evidence of Japanese Germ Warfare Found in China

Chinese researchers say they have uncovered more evidence of the use of germ warfare by Japanese forces in southwestern China's Yunnan during the Second World War. Su Yi has more. The findings by researchers are suggesting the wide-spread use of prot

发表于:2018-12-19 / 阅读(60) / 评论(0)

世界各地新闻集锦

SSS 2009-04-13

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. The Earths original atmosphere would have been unpleasantdeadly in factto any organisms that breathe oxygen. There wasnt any. Not until about 2.4 billi

发表于:2018-12-24 / 阅读(59) / 评论(0)

Scientific American(四)月

SSS 2008-10-17

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. In 1953 a student named Stanley Miller did an experiment showing that the simple chemicals present on the early Earth could give rise to the basic buildi

发表于:2019-01-08 / 阅读(59) / 评论(0)

Scientific American(十)月

VOA慢速英语 2007 0110a

This is the VOA Special English Health Report. A mother in Tamil Nadu, India, recently had a question for our new series on children and parenting. This woman in Tuticorin has a son who is almost three years old. He attends a pre-kindergarten school.

发表于:2019-01-11 / 阅读(40) / 评论(0)

VOA慢速英语2007年（一）月

每日一词【1105】Germ：病菌，细菌

今天我们要学的词是germ。 Germ,病菌，细菌。流感季节到了，现在很多家庭都备有洗手液，但是最新研究指出， Hand Sanitizers only work for 2 minutes to kill germs. 洗手液杀菌的功能只能持续两分钟。不

发表于:2019-02-02 / 阅读(66) / 评论(0)

英语每日一词

学个词Learn a Word 第1105期 Germ

发表于:2019-02-04 / 阅读(55) / 评论(0)

英语单词荟萃

Researchers make sperm from stem cell in dish

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

发表于:2019-02-04 / 阅读(193) / 评论(0)

英语新闻

【推理类英语听力】30

A: How's John? B: He's very sick. The doctors are keeping him for several days. A: Have you visited him yet? B: I'm going there today. Would you like to go with me? A: I would like to, but I think I'm coming down with a cold. B: Then you should stay

发表于:2019-02-26 / 阅读(87) / 评论(0)

推理类英语听力

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