Definition (位置)
Used to ask about the whereabouts of something that cannot be found.
（用于寻找不到东西时）东西去哪了？
Where have my keys gone?
我的钥匙去哪了？
Where has my ruler gone? It was just here a moment ago!
我的尺子去哪了？刚才还在这的！
Where has my bag gone? Oh, it's here, under the desk.
我的包去哪了？哦，在这，在桌子底下。