Catching up with their prey is one thing. 追上猎物是一回事

135. Their prey, Arkansaurus, is also a dinosaur...
     它们的猎物阿肯色龙也是一种恐龙
136. but it leads a very different, mainly plant-eating life.
     但过着 非常不同的、以植物为主食的生活
137. What they both share, however is speed.
     但两者的速度都很快
138. Catching up with their prey is one thing.
     追上猎物是一回事
139. Bringing it down...
     将猎物拿下
140. ...another.
     是另一回事
141. Working together,
     它们进行协作

来自《我们星球上的生命 第一季 第五集 Life on Our Planet S01E05 巨兽阴影下》第 138 行