Science

X or Y? Choosing the right sex of animals

作者：AGENCIES

SYDNEY - Australian scientists have claimed a commercial breakthrough after breeding 25 lambs whose sex was successfully selected before conception, bringing a possible end to the mass slaughter ...

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期二十一世纪英文报尊享卡用户，我们开放所有内容：
如果您拥有以上权限，请点这里登录；
订阅电子报，请点这里；
激活VIP教师卡，请点这里；
激活21英语尊享卡，请点这里。