英语语法分析

He has been studying palaeontology with great tenacity.

他一直锲而不舍地研究古生物学。

In the field of palaeontology, for example, the stock of crocodiles is rising.

譬如，在古生物学领域，鳄鱼研究正在升温。

This is because, at its core, palaeontology works by comparing past and present organisms with each other.

这是因为古生物学的核心就是将过去和现在的生物相互对比。