n.通风；通气；公开讨论
动词ventilate的现在分词形式.
They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
It is possible to design good heating ventilating and air conditioning systems at a reasonable cost. 人们可以用合理的造价设计一个良好的采暖通风和空气调节系统。
