there was a limit to how far they could rise. 它们的崛起受到限制
Ross: I thought it was a 50cent limit. 我以为50分是上限。
But there is a limit on how fast it can do so. 但适应速度是有极限的
A land of extremes that pushes life to the limit. 极端的生存环境把生命推向极限
The camels must limit themselves to the equivalent of just 10 litres a day. 骆驼必须限定自己 每天只能吃10升左右的雪