天南地北, 天南海北

tiānnán-dìběi, tiānnán-hǎiběi

(1) [separate far and wide; be far apart]∶相距遥远

(2) [every and any subject under the sun]∶形容 [谈话] 漫无边际

(3) [from different places or areas]∶形容地区各不相同