monogamy
n. 一夫一妻制；[动] 单配偶，[动] 单配性
例句
In many non-Western societies, however, monogamy has never dominated.
然而，在很多非西方社会，一夫一妻制从未占主导地位。
《柯林斯英汉双解大词典》
People in rich countries value monogamy and tend not to stray often.
富裕国家的人重视一夫一妻制，并倾向于不经常出轨。
People still opt for monogamy and marriage.
人们还是选择单一配偶制和婚姻。
