基本解释n.抽空同根派生 英汉例句The filter integrates two stages of coarse filters and one stage of fine filter, as well as a de-dust device by exhaust gas vacuation. 该滤清器由两级粗过滤器和一级精滤器集合而成，并带有废气引射抽尘装置。s afetye vacuation 安全疏散