基本解释n.承口(锥形孔；钟形套管；测流喷管)同根派生 英汉例句The Application of Non-uniform Bellmouth in Prestressed Concrete Flat-beam 变截面喇叭口在预应力混凝土扁梁中的应用bellmouth orifice 喇叭孔telescopic bellmouth 套筒式漏斗口square bellmouth transition 方喇叭形渐变段bellmouth area 喇叭口区