Karen tried to swimafter him but the strong undercurrent swept them apart.
卡伦试图跟在他后面游，但强大的暗流把他们冲开了。
《柯林斯英汉双解大词典》
2
Swimafter them!
在他们后面游！
3
She finished third in her semi-final swim in August. Shortly after the semi-finals, she became a trending topic on Chinese social media and she became famous quickly around the world.