vacuum

/'vækjʊəm/

n 真空

记忆： vac(空的) + uum → 真空

例句：His presence should fill the power vacuum that has been developing over the past few days.（他的出现应该能填补过去几天中形成的权力空缺。）

短语：vacuum pump；in a vacuum；high vacuum

同近：room；gamma space