unaccounted for

劍橋詞典

If a person is unaccounted for, it is not known where they are or whether they are still alive .
（某人）生死未知的
A fire on the ship killed a hundred or more passengers - some likely victims are still unaccounted for. 船上的大火讓一百多名乘客喪生，可能還有些人生死未知。

If something such as an amount of money is unaccounted for, it is not present and there is no explanation for what has happened to it.
（金錢）找不到的，去向不明的
An audit of the police department found that $100,000 in cash and one handgun were unaccounted for. 對警察局進(jìn)行的審計發(fā)現(xiàn)有10萬美元現(xiàn)金和一支手槍去向不明。 返回 unaccounted for