The new office overlaps the functions of one already in existence.新机构的职能与一个现存机构的职能部分重叠。There is a small overlap between the two circles.在这两个圆周有一小部分重叠。The two circles overlap.两个圆部分重叠。The new office overlaps the functions of the one already in existence.新机构的职能与那个现存机构的职能部分重叠。