As all the living forms of life are the lineal descendants of those which lived long before the Cambrian epoch, we may feel certain that the ordinary succession by generation has never once been broken, and that no cataclysm has desolated the whole world.
英
美
- 由于現存的各式生物都是遠在志留紀前就已存在的生物的直系后代，我們可以肯定代代相接的通常延續過(guò)程從未中斷過(guò)，也從未有過(guò)大災變使整個(gè)世界遭受破壞。
