His wife Nancy had to breastfeed their children as Beatie was unable because male hormones prevented him from producing milk.
由于比提体内的男性激素使得他无法哺乳，他的妻子南希不得不替他们的孩子喂奶。In mammals, females are XX while males are XY so a woman should never be able to provide the necessary Y chromosome genes to produce a son.
在哺乳动物中，雌性的性染色体是XX，而雄性的是XY，所以一个女人是绝不可能产生男性不可缺少的Y染色体基因而生育男孩的。A horse has considerably wide vision (and the largest eyes of any land mammal) - being able to see a total field of up to 350 degrees.
马的视野覆盖范围相当广（它的眼睛也是陆生哺乳动物中最大的）能够看到350度开外的地方。I thought about this little book, because the author has this in common with me that for him the question of mammals has been resolved.
我思维这本小书，因为作者跟我有共同点见解：对于他，哺乳动物的问题已经被解决。Dr Simpson's analysis indicates that the relationship between dinosaurs and mammals was actually that of a diner to his lunch.
辛普森博士的分析指出恐龙和哺乳动物之间的关系实际上就是用餐者和午餐的关系。No one has ever before documented the spread of a learned behavior through a population of these marine mammals over a short period of time.
从前没有人记录过这种海洋哺乳动物的学习行为短时间内在种群中扩散的现象。Of the one-and-a-half million fungal species on Earth, only a few hundred are capable of infecting mammals.
世界上共计有150多万种不同的真菌，其中只有数百种能对哺乳动物造成感染。In Antarctica, the only mammals are those that stay for just a short time -- marine mammals like whales and seals.
在南极，独一的哺乳动物是那些仅仅停留很短的时间-像鲸鱼和海豹这样的海洋哺乳动物。Mammals are more complex still, but even they might be amenable to this sort of extinction modeling.
哺乳类还要复杂，不过，即使是它们都可能适合这种灭绝建模。