keep in with someone
phrasal verb with keep verb uk/kiːp/ us/kiːp/ kept | kept
（尤指为得到帮助）与（某人）友好相处，不得罪（某人）
to continue to try to be friendly with someone, especially because they can help you
I like to keep in with my ex-employer, you never know when you might need a reference. 我愿意同以前的雇主保持良好关系，因为说不定什么时候或许会需要他的推荐信。