Unaccounted-for Water但未计量用水
unaccounted-for leakage不明泄漏
unaccounted-for loss其它损失;未计及的损失
ADJ（形容词） If people or things are unaccounted for, you do not know where they are or what has happened to them. 不知去向的; 下落不明的 [v-link ADJ]
5,000 American servicemen who fought in Korea are still unaccounted for.
5000名曾在朝鲜打仗的美国军人仍下落不明。