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
Richard's going to take some wedding pictures before the ceremony.
在婚礼前Richard准备拍一些结婚照片。
He has a pound of beef.
他有一磅牛肉。
But the first people who were like ourselves lived so long ago that even their sagas, if they had any, are forgotten.
但是，和我们相似的原始人生活的年代太久远了，因此，有关他们的传说既使有如今也失传了。