but one giant leap for life on Earth. 地球生物一大步

143. ...has run here for a reason.
     跑来这里是有原因的
144. She can fly.
     它会飞
145. One small step for a dinosaur,
     恐龙一小步
146. but one giant leap for life on Earth.
     地球生物一大步
147. With these early gliders,
     通过这些早期的滑翔者
148. a new dynasty was born.
     一个新的王朝诞生了
149. And it was flight that would help their descendants stay alive
     在小行星撞击地球之后的时代

来自《我们星球上的生命 第一季 第六集 Life on Our Planet S01E06 灰烬中重生》第 146 行