missing

不見的、遺失的、找不到的

Two books are missing from the shelf on the top floor.

頂樓書架上少了兩本書。

失蹤的、下落不明的多指人

Three hikers are still missing after the heavy storm.

暴風雨過後，仍有三名登山者下落不明。

缺少的、欠缺的、缺失的

This jigsaw puzzle has a missing piece in the corner.

這幅拼圖角落缺了一塊。

失蹤、不見go missing

Her passport went missing somewhere between the hotel and the airport.

她的護照在飯店到機場之間不知去哪了。