boston marriage具体指什么？

你不太会找 ：）

给你个英文的解释：
Boston marriage was a term used in the nineteenth and twentieth centuries for households where two women lived together, independent of any male support. These relationships were not necessarily sexual; the existence of platonic Boston marriages was used to quell fears of lesbianism following the loss of men in World War I.[1] Today, the term is sometimes used when referring to two women living together who are not in a sexual relationship. Such a relationship may involve intimacy and commitment without sexuality.

你也可以到google上去搜，我的抄自 wikipedia（最全的百科全书：））

我大致看了看，boston marriage 这个短语是指不依赖性而在一起生活的女性。起源于19、20世纪，由于一战死了很多男人，她们便组成了“家庭”。

你可以上wikipedia找此词的详解，有很多，足够你上课要讲的素材了。希望能帮到你 ：）