相关单词近义词 lengthener 伸长器, extender 增量剂, stretcher 担架, expander 扩充器, increaser 异径接头管, enlarger 放大机临近词protract, protractor head, protracted test, protracted dose, protract a visit, protracted labor, protraction dose, protractor scale, protracted break, protracted effect, Protracted Nature相似词prototype, prototypical, protozoan, protracted, protrude, protrusion, protuberance, protuberant, 返回 protractor