unfortunateadj.不幸的;令人遗憾的n.不幸的人
unforeseenadj.无法预料的
unforgettable past难忘的往事
unforgettable years难忘的岁月
unforgettable adj.忘不了的;令人难忘的
unforgettable memory难忘的回忆
unforgettable occasion难忘的场合
unforgettable character令人难忘的人
unforgettable expericnce难忘的历程
unforgettable contributions不可泯没的功绩
unforgettable things in the past难以忘怀的往事