n. 打开；公开赛事；旷野（open的复数形式）

n a clear or unobstructed space or expanse of land or water

n where the air is unconfined

n a tournament in which both professionals and amateurs may play

n information that has become public

v cause to open or to become open

v start to operate or function or cause to start operating or functioning

v become open

v begin or set in action, of meetings, speeches, recitals, etc.

v spread out or open from a closed or folded state

v make available

v become available

v have an opening or passage or outlet

v make the opening move

v afford access to

v display the contents of a file or start an application as on a computer