First off, cousin marriage is way more common than you may think.

首先， 表亲婚姻比你想象的要普遍得多。

For example, the idea that cousin marriage is, to use a scientific term, icky.

例如，表亲婚姻的想法，用科学术语来说，是恶心的。

The House of Hanover was notorious for cousin to cousin marriage, sometimes first cousin, sometimes second or third.

汉诺威王朝因表亲结婚而臭名昭著， 有时是第一代表亲，有时是第二或第三代表亲。