Alas for Schizodactylus, the sandy deserts it prefers have retreated from north-eastern Brazil and its optimality there has vanished.

唉，对节肢动物来说，所喜爱沙质沙漠已经从巴西东北部退却，最佳体态已经消失。

In some sense, anytime anybody says it's optimal, sounds really good, sounds like it can't be beaten, but they've chose the optimality criteria.

从某种意义上说， 任何时候有人说是最优，听起来真很好， 听起来好像是无可匹敌，但他们选择了最优性标准。