they've evolved to hover just like insects... 它们进化出像昆虫一样的悬停能力
...with needle-sharp teeth for hunting insects. 锋利的牙齿 用于捕食昆虫
The insects were some of the first to emerge... 最早出现的有昆虫
She's a member of another ancient group of social insects... 它是另一个 古代社会性昆虫群体的成员
Other insects in the dinosaur era soon got in on the action... 恐龙时代的其它昆虫 也很快加入这一行动
Insects were hit hard in the mass extinction, 昆虫在大灭绝中遭受重创
the ultimate flying insects first appeared back in the ancient swamps. 最终能够飞行的昆虫 最早出现在古代沼泽中