prolongationn. 延伸、延長、延長部分伸長學術名詞延長:數學、音樂、土木工程拓展:數學延長線:測量學延伸:礦物學伸長:礦物學英文釋義the act of prolonging somethingamount or degree or range to which something extendsthe consequence of being lengthened in duration