Ufos
abbr. 不明飞行物（Unidentified Flying Objects）
🗣️ 情景例句
He graduated from medical school in 1960
他在一九六零年从医学院毕业，
The restaurant is in the basement.
那餐厅在地下室。
By the way, I came into this classroom last Saturday morning, and it was not as clean as usual.
顺便提一句，上星期六上午我来到这个教室时