Urrs
(urr 的复数) [医]上游调控区
🗣️ 情景例句
As a matter of fact,
事实上，
Archeologists still can only surmise as to the origin of Man.
考古学家们对于人类的起源依然无法推测。
Mr. Smith taught English at a school.
史密斯先生在一所学校教英语。