money是金钱，marry是“嫁，娶”，marry money也就是和有钱人结婚；跟有钱人结婚。

【例句】
Given the extreme age difference between them, a lot of people speculated that she was simply marrying money.
鉴于他们之间极大的年龄差距，很多人推测她只是跟有钱人结婚。

I think it's quite sad that people would rather marry money than find someone they truly love.
我想人们宁愿和有钱人结婚不愿意寻找他们真正爱的人，这件事很悲哀。