Ucas
(uca 的复数) abbr. upper control area 上部控制区
🗣️ 情景例句
OK. Good night.
好， 晚安。
Do not cut down the tree that gives you shade.
不要忘恩负义。
Even so, people are going to find it difficult to get to work.
即使这样，人们仍会感到上班有困难。