Ucb
abbr. 单元控制部件（Unit Control Block）
🗣️ 情景例句
It's just one of those things.
这样的事情总是难免的。
He has spent over six years working in Africa and India.
在非洲和印度工作了六年。
But in an old man who has known human joys and sorrows,
可是老年人已经饱尝了人间的甘苦，