相关单词近义词 protractor 量角器, extender 增量剂, stretcher 担架, expander 扩充器, increaser 异径接头管, enlarger 放大机临近词lengthen, lengthening bolt, lengthen a vowel, lengthening coil, lengthened pulse, lengthened sounds, lengthen the span, lengthening piece, lengthened tunnel, lengthened dipole, lengthening joint 返回 lengthener