Udu
abbr. underwater detection unit 水下探测设备，水下探测器; user data unit 用户数据单元
🗣️ 情景例句
with the school-board committee.
与联合校董会有关。
All this time Dick has only thought of his own future.
近些时来，迪克老是在思考自己的将来。
It suddenly dawned on me that this express was not roaring down the line at ninety miles an hour, but barely chugging along at thirty.
我突然感到这趟快车并没以时速90英里的速度呼啸前进，而是卟哧卟哧地向前爬行，时速仅30英里。