From two microscopic half-cells merged in a surge of passion, the miracle of genetics has transformed that single cell into a zillion-celled, complex, functioning animal organism.

• 汹涌的激情把两个半细胞结合在一起，这真是遗传的奇迹。之后它又把单细胞变成了千千万万个由多细胞组成，复杂的生物。