vacuum
C1英 /ˈvækjuːm/美 /ˈvækjuːm/
释义
noun
真空
a space that is completely empty of all substances, including all air or other gas
“a vacuum pump (= one that creates a vacuum)”
在真实视频里记住 vacuum
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a vacuum pump (= one that creates a vacuum)
真空
vacuum· 真空
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