/ˈvækjuːm/
a space that is completely empty of all substances, including all air or other gas 真空
a vacuum pump (= one that creates a vacuum )
真空泵
vacuum-packed foods (= in a package from which most of the air has been removed)
真空包装的食品
/ˈvækjuːm/
a space that is completely empty of all substances, including all air or other gas 真空
a vacuum pump (= one that creates a vacuum )
真空泵
vacuum-packed foods (= in a package from which most of the air has been removed)
真空包装的食品