三叶虫和恐龙已经绝种。
Trilobites and dinosaurs are extinct.
牛津词典出版商正在校对一本关于恐龙的书。
A book about dinosaurs was being proofed by the publisher.
牛津词典一些恐龙从头顶上进化出隆起部分。
Some dinosaurs evolved protuberances on top of their heads.
牛津词典恐龙已经绝种很久了。
Dinosaurs have been extinct for a long time.
权威词典恐龙在进化过程中绝迹。
In the course of evolution, dinosaurs passed out of existence.
权威词典
