unaccounted
adj[pred 作表语]
~ for
(a) not included in an account, a tally, etc 未包括在某数目、 帐目等中
One passenger is still unaccounted for. 仍有一个旅客未在其中.
(b) not explained 未予解释的; 未加说明的
His disappearance is unaccounted for. 他失踪原因不明.
🗣️ 情景例句
Next time you are in town, drop me a line.
下次你在城里的时候给我写信吧。
To operate a steam locomotive
驾驶蒸汽机车
First it made a circle to the right, then to the left.