directional · referring to both the interior and exterior of a physical space or object

他把房子内外都打扫得干干净净。

directional · used after a quantity or duration to indicate an approximate amount or time

他在北京待了三天内外就回来了。

place word · relating to internal and external affairs, or both at home and abroad

这项政策引起了海内外各界的广泛关注。