我认识他，但我俩并不常来常往。

I know him, but we dont frequently see each other.

房子的装饰就是常来常往的朋友。

The ornament of a house is the friends who frequent it.

在许多方面马勒生活的很惬意，与当时的音乐和艺术界名流们常来常往，诸如。

In many ways, though, Mahler led a charmed life, mixing with the musical and artistic elite of his day.