Vacuuming
n. 真空处理；资料移除
🗣️ 情景例句
He graduated from medical school in 1960
他在一九六零年从医学院毕业，
To lose a freind is the greatest of all loses.
失掉朋友是一切损失中最大的损失。
Pumas are large, cat-like animals which are found in America.
美洲狮是一种体形似猫的大动物，产于美洲。