MIA
adjective uk/ˌem.aɪˈeɪ/ us/ˌem.aɪˈeɪ/
任务中失踪（missing in action的缩写）
abbreviation for missing in action: used for saying that a member of the armed forces has not returned from fighting in a war but is not known for certain to be dead
High numbers of military were still listed as MIA. 大量士兵仍被列为”在任务中失踪“。
This is done routinely to identify the remains of MIA soldiers. 这通常被用于指认在任务中失踪士兵的遗体。