So too is the battlefield itself, 战场本身也在不断变化

141. Competition, both within and between species,
     物种内及物种间的竞争
142. has always driven evolution.
     一直推动着进化
143. But it's not just those doing battle that are always changing.
     但不断变化的 不仅仅是参与战斗的生物
144. So too is the battlefield itself,
     战场本身也在不断变化
145. which leads to the third rule of life.
     这产生了生命的第三条法则
146. Earth never remains stable for long.
     地球从不会长♥期♥保持稳定
147. Sometimes that helps life.
     有时候这有助于生命

来自《我们星球上的生命 第一季 第一集 Life on Our Planet S01E01 生命法则》第 144 行