The idiom "pigeon pair" originated in the early 20th century and was derived from the pigeon's tendency to lay two eggs at a time, typically one male and one female. This idiom is used to describe the gender composition of siblings in a family. It indicates that the family has one child of each gender. It is often used colloquially to describe the birth of a boy and a girl in quick succession.

“pigeon pair”的英语定义和含义

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