[ C or U ] a space from which most or all of the matter has been removed, or where there is little or no matter 真空
[ S ] a lack of something缺乏,空白
kept separate from other people and activities似在真空中;与世隔绝
[ C ] a vacuum cleaner 真空吸尘器(同 vacuum cleaner)
to use a vacuum cleaner to collect dust, dirt, etc.用吸尘器清扫
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