opening at... 地方有空缺openingn.开口；开始；张开；开幕；空缺adj.开头的动词open的现在分词.opening maths problems数学开放题opening circuit switch断路器opening a bank account开立银行存款户opening teaching method开放式课堂教学法opening on flange plate翼缘开孔Opening Degree of Trade贸易开放度opening for an engineer工程师职位空缺opening of laboratories实验室开放Opening-reinforcement开孔补强Opening stiffening ribs开口加劲肋