翻译，“自从他们相识以来，他们一直保持联系” 关键词 keep in touch 一定要用关键词

They have kept in touch with each other ever since they got to know.

自从他们相识以来，他们一直保持联系
Has been acquainted with one another since them, they continuously keep in touch

They keep in touch with each other ever since they got acquainted.

They keep in touch with each other ever since they got acquainted.

they have been kept touch since they got to know each other.