“净空”怎么读

“净空”的英语可以翻译为：headroom，freeboard，clearance ...

前舱有6英尺高的净空，也有足够的空间供人站立和穿衣服。The forecabin, with 6ft head-room, also has plenty of room to stand and get dressed.这座桥梁下面的净空高度不够,公共汽车不能通行.There is not enough headroom for buses to go under this bridge.桥梁在深谷水面以上的垂直净空为100英尺.Th...