Ucb
abbr. 单元控制部件（Unit Control Block）
🗣️ 情景例句
Do? I don't know.
读什么 ？我不知道。
I will take a helicopter.
我将去搭直升飞机。
They all went up some narrow steps into a large room.
他们全都登上这些狭窄的台阶，接着进入一个大房间。