释义：阿那克西米尼认为宇宙中的一切都可以归结为空气，而气息则是宇宙存在的核心和动力。

But the old man thought only of his steering and his great tiredness. He had gone out too far and the sharks had beaten him. He knew they would leave him nothing but the stripped skeleton of his great catch.

The beauty of formal methods lies in their ability to provide absolute certainty about the correctness of a system.