n. a clear or unobstructed space or expanse of land or water
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
n. 公开, 户外, 空旷
a. 开着的, 开放的, 开阔的, 营业着的, 公开的, 悬而未决的
vt. 打开, 公开, 开放
vi. 展开, 开始, 展现
[计] 打开指令; 打开语句