vacant [ˈveikənt]
a.空的；未被占用的
例句1, The hotel had several vacant rooms available for last-minute bookings.
酒店有几间空房可供临时预订。
例句2, She stared at the vacant lot, imagining the possibilities for a new garden.
她凝视着那片未被占用的空地，想象着新花园的可能性。

vacuum [ˈvækjuəm]
n.真空；真空吸尘器
例句1, The scientist conducted the experiment in a

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