相关单词近义词 continuation 继续, extension 延长, addition 增加, continuance 继续, pursuit 追求, protraction 延伸, perpetuation 永存, drawing out 并条, maintenance 维修, elongation 延伸, lengthiness 冗长, lengthening 延长临近词prolong, prolong its service life, prolonged administration, prolonged corrosion test, prolonged occlusion test, prolonged pulse-taking, prolonged viral hepatitis, prolonged low grade fever, prolongation of life span, prolonged breath-sounds, prolonged-release system 返回 prolongation