at sea
困惑、迷失或不理解的状态
口语·表示困惑或不知所措
英文释义
to be confused or unsure about something
例句
After the professor's confusing explanation, I was completely at sea about the assignment.
典故来源
源自航海时代，水手在茫茫大海中失去方向感，比喻人在复杂情境中感到迷茫或困惑。