大家都知道雙胞胎有同卵和異卵之分，但你知道“愛爾蘭雙胞胎”是什么嗎？

Irish twins refer to siblings born within 12 months of each other. In other words, Irish twins are born in succession within one year.

愛爾蘭雙胞胎指的是出生時間相差不超過12個月的兄弟姐妹。換言之，愛爾蘭雙胞胎是在一年內相繼出生的。

The term pokes fun at the stereotypical fertility of Irish Catholic families, which traditionally do not use birth control. In addition, it implies that the Irish lack the ability to plan ahead or control themselves, having children in quick succession rather than responsibly spacing them.

該詞是對愛爾蘭天主教家庭多子女傳統的一種嘲笑，因為這些家庭不會采取節育措施。此外，該詞還暗諷愛爾蘭人缺乏提前計劃或自制的能力，生孩子一個緊接一個，而不是負責任地錯開時間生。

Example:

My sister and I were born 11 months apart. We were known in our family as Irish twins.

我姐姐和我出生只相差了11個月。在我們家里，我們被稱為“愛爾蘭雙胞胎”。

（中國日報網英語點津 陳丹妮）