openingn.开口;开始;张开;开幕;空缺adj.开头的动词open的现在分词.
opening cover打开封面
opening heart心内直视术
opening mould开模
opening round首回合
opening group打开组
opening space开辟空间
opening stage最初阶段
opening style开放型
opening valve通路阀
opening device开启装置