vacant lattice site

例句：

1. 1. The room was vacant except for the bookshelf.
   除了书架，房间是空的。
2. 2. The vacant chair looked lonely and abandoned.
   那个空椅子看起来孤独且被遗弃了。
3. 3. The vacant office is now being renovated.
   这个空办公室现在正在翻新。