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，它所喜爱的沙质沙巴西东北部退却，它在里的最佳体态消失。

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.

意义上说， 任何时候有人说它是最优的，听起来真的很好， 听起来好像是无可匹敌的，但他们选择了最优性标准。