遗传变异使得每个人都是独一无二的。

Heritable variation makes each person unique.

这世界上每个人都是独一无二的。

Everybody is unique in this world.

因为每个人都是独一无二的，因为每一个人都很特别。

Because everybody is the one and only, because of each persons very special.

假如每个人都是独一无二的，也就没有一模一样的爱。

If no two people are the same, no two people's love is the same either.