Ucas
(uca 的复数) abbr. upper control area 上部控制区
🗣️ 情景例句
Good. Do you have any back or knee problems?
好。你的背部和膝关节有什么毛病吗
He often plays cards.
他常常玩扑克牌。
He reasoned with them, and tried to persuade them to set him free.
他跟这些人讲道理，试图说服他们把他放了。