V-T If you expunge something, you get rid of it completely, because it causes problems or bad feelings. 清除; 抹去 [正式]
The revolutionaries expunged domestic opposition.
革命者清洗了国内反对派。
The experience was something he had tried to expunge from his memory.
这种经历是他过去试图从记忆中抹去的。
His name was expunged from the record books.
他的名字从记录册中被删除了。
The methods of expunging methanol from C5 with pervaporation membranes were studied in this paper.
对用渗透蒸发膜分离方法去除C5中的甲醇进行了研究。
Decades after expunging the idea of "small wars" from their textbooks after the trauma of Vietnam, American officers are relearning the lessons the hard way.
美国在越南饱受创伤之后，花了几十年从教科书上删去了“小战争”的概念，但美国的军官正困难地重学教训。
Her whole day was dedicated to the ritual of preparing food in tiny portions that she would sometimes not even eat, and to expunging calories by ruthless exercise regimes.
她每天都忙着把食物装成很小份，只吃一点点，有时候甚至都不吃东西，还要通过残酷的运动来减肥。
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