单词：male sterile restoring line
单词：male sterile restoring line 相关文章
Reducing HIV Risk with Painless Male Circumcision Studies have shown that male circumcision greatly reduces the risk of HIV transmission. The World Health Organization is weighing approval of a new device that could make the procedure simple and pain
VOA标准英语2011年(十二月)
Probably everyone knows by now that the Duchess of Cambridge wife of Prince William is pregnant. For some time now, Britain and the Commonwealth heads of government have been talking about changing the law to allow a female baby to be next in line to
新西兰英语
The first time you visit your boyfriends place, he no doubt tidies up, to give you the illusion that he doesnt live like an animal. Well, animals, too, can use optical illusions to woo a mate. Take the bowerbird. 你第一次去男朋友的家里，他
60秒科学
This is Scientific American's 60-Second Science. Im Karen Hopkin. This will just take a minute. The first time you visit your boyfriends place, he no doubt tidies up, to give you the illusion that he doesnt live like an animal. Well, animals, too, ca
Scientific American(九)月
Gender-Jumping Toads 美国研究人员说，常用除草剂阿特拉津会令雄蛙变性为雌蛙。美国加利福尼亚大学伯克利分校研究人员把40只雄性非洲爪蛙放入阿特拉津浓度为10亿分之2.5的水中，发现90%雌性化
英语听力文摘 English Digest
Fatherless Honeybee s How male honeybee s can be without fathers? The reason lies in whats called a haploidiploid system of sex determination. Approximate ly one-fifth of the animal kingdom, including ants and wasp s , use this system. What it boils
英语听力文摘 English Digest