The idea that birds—the most diverse group of land vertebrates, with nearly 10, 000 living species—descended directly from dinosaurs isn't new.
鸟类是陆生脊椎动物中分支最多的群体，拥有将近10000个不同的种类，有科学家认为鸟类是直接从恐龙进化而来的，这种想法并不新鲜。
The new species belongs to a group of dinosaurs called the Ornithischia.
这一新物种属于鸟龙类。
The team has been careful not to call Denisovans a new species, opting instead to label them as a Neanderthal "sister group."
该研究小组谨慎的未将丹尼索万人称为新的人类物种，而是将他们定为尼安德特人的“姊妹族”。
The predator has been identified as a new species of pliosaur, a group of extinct aquatic reptiles that had huge skulls, short necks and four flippers to power them through the water.
这种食肉动物已被确认为一种上龙，上龙是一类已经灭绝了的水生爬行动物，有巨大的头骨，粗短的脖子，还有令它们在水里来去自如的四只脚蹼。
The values of DNA-DNA homology between type strains of these species were less than 70%, which showed that strain SH2672 (representative strain of new group) represented a new rhizobial species.
且分支内各种间DNA同源性低于70％，表明它们分别为不同的种，菌株SH2672代表着一个新的根瘤菌种。
Although the original species becomes extinct, its genes are carried by the new group.
原来的种虽然绝灭了，但其基因则被一个新的门类所继承。
Although the original species becomes extinct, its genes are carried by the new group.
原来的种虽然绝灭了，但其基因则被一个新的门类所继承。
应用推荐