halbebene half-planehalf planehalf-pistonhalf-plane半: half平面: plane; two dimensions; flat ...半平面图: half-breadth plan闭半平面: closed half plane; closed half space封闭半平面: closed half plane下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:半平面,即可在微信中查询翻译