vacancy例句

The vacancy of her expression made me doubt if she was listening.
她茫然的神情让我怀疑她是否在听.

Lucy is the best person to fill this secretary vacancy.
露西是秘书这个空缺的最佳人选.

This will help to fill a vacancy in our knowledge.
这有助于弥补我们知识上的空白.

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