opening

n.最初；空地；洞，孔，通道；(职位的)空缺

open to, open up, open verdict, open vowel, open-air, open-and-shut, open-ended, open-eyed, open-handed, open-handedly, open-handedness, open-heart surgery, open-hearted, open-minded, open-mindedness, open-mouthed, open-plan, open-work, opencast, opener, opening night, opening-time, openly, openness, opera, opera-glasses, opera-house, operable, operate, operatic, operatically, operating system, operating-table, operating-theatre, operation, operational, operations room, operative, operator, operetta,