there are plenty more fish in the sea idiom
mainly UK (US usually there are plenty of fish in the sea)海里的鱼有的是；还有很多合适的人（或机会）
used to tell someone whose relationship has ended that there are many other people that they could have a relationship with
Don't cry over Pierre - there are plenty more fish in the sea! 别为皮埃尔哭了，天下的好男人多的是！