dinosaur是单数还是复数

是单数，复数形式是dinosaurs，中文意思是n. [古生]恐龙（dinosaur 的复数形式）；恐龙类

It has been suggested that mammals took over from dinosaurs 65 million years ago.

有人提出哺乳动物是在6 500万年前取代恐龙的。

Recent, more dramatic use of CGI was seen in "Walking With Dinosaurs."。