相关单词近义词 prolongation 延长, perpetuation 永存, protraction 延伸临近词lengthen, lengthened reamer, lengthen one's life, lengthening culvert, lengthened coupling, lengthening mascara, lengthening spindle, lengthened off time, Lengthening of femur, lengthening reaction, Lengthening of Penis 返回 lengthening