Paleontological studies showed that modern avian groups probably first appeared in the Paleocene and experienced an explosive radiation in the early Cenozoic. 古生物学研究表明,现生鸟类的最早出现是在古新世,而爆发性辐射演化发生在新生代早期。
The next year, during paleontological excavations, primitive stone tools came to light, bringing with them the tantalizing possibility that fossilized human remains might eventually follow. 第二年,古生物学家在那里发掘出原始石器,让人兴起也许还能找到人类化石的希望。
paleontological
[ adj ] of or relating to paleontology <adj.pert>
Paleontological \Pa`le*on`to*log"ic*al\, a. Of or pertaining to paleontology. -- {Pa`le*on`to*log"ic*al*ly}, adv.