But you're fraternal twins.

但是你们是龙凤胎。

The fraternal twins have genetic differences.

异卵双生胎的则存在基因差异。

In fraternal twins, the percentage drops to about 25 to 40 percent.

在异卵双胞胎中，这一比例则下降到约百分之二十五到百分之四十。

Identical twins were much closer than fraternal twins in unhappiness.

同卵双胞胎在不悦的程度上比异卵双胞胎更为接近。

You could say that she's my female half because we're fraternal twins.

你可以说你是我的半个女人，因为我们是龙凤胎。