As the British zookeeper who discovered virgin births in Komodos put it, rather like buses, you wait ages and then loads of them come along all at once.

• 正如发现巨蜥单性生殖的英国的动物园管理员所描述的，像等公共汽车一样，等了好长时间，然后一群小蜥蜴就一股脑地都出来了。