1. The reason for what follows remains a mystery for zoologists and naturalists. 接下来发生的事情的原因对于动物学家和自然学家来说仍然是个谜。
2. Will zoologists ever know the evolutionary sequences in the Cambrian explosion? 动物学家们会知道寒武纪大爆发时期的进化顺序吗？
3. Zoologists wanted to know why a young meerkat would stop using its charm to get free food and begin working for its own food. 动物学家们想要明白，为何年轻的獴会停止用它的魅力来获取免费食物，开始为它自己的食物工作。
4. Many zoologists believe that it was because so many ecological niches were available with virtually no competition from existing species. 很多动物学家认为，这是因为，在几乎没有任何现存竞争物种的情况下，有太多的生态小生境可供生存。
5. This guess was questioned by zoologists as follows. 这一猜测遭到动物学家的质疑。
