They tweaked the bird-flu virus 's genes to produce a version which can travel through the air from ferret to ferret .
他们将禽流感病毒的基因略作调整，产生了一种可通过空气在雪貂之间传播的新品种。
Each team engineered the virus so that it could be transmitted through the air from ferret to ferret ( ferrets , surprisingly , are good proxies for humans ) .
Each team engineered the virus so that it could be transmitted through the air from ferret to ferret ( good proxies for humans ) .
每个团队都将病毒加以转基因处理使其可以由白鼬（人类的良好代替品）携带在空气中传播。
A particular stage in brain development seems quite simply to be the time to start to walk , independently of whether you are a hedgehog , a ferret or a human being .
大脑发育的一个特定阶段简而言之就是要开始行走的那个时刻，而这同是一只刺猬，一只雪貂或是一个人无关。
You might think that clay johnson , a campaigner for transparency , would be pleased to see a ferret , with a deerstalker hat and magnifying glass , pop up on his screen .
