1. We have fully functional smoke alarms on all staircases. 我们在所有楼梯上都装有运转完全正常的烟雾报警器。
2. The staircases change, remember? 楼梯会改变，记得吗？
3. We would live in a large two-story house with floors and staircases made of wood. 我们将住进一幢两层的大房子，地板和楼梯是木制的。
4. The stores have all the hallmarks of a legitimate Apple outlet, completing with glossy hardwood tables and minimalist staircases. 这些商店拥有一个合法的苹果专营店的所有特征，有光滑的硬木桌子和简约楼梯 。
5. The Chinese built their pagodas in brick or stone, with inner staircases, and used them in later centuries mainly as watchtowers. 中国人用砖或石头建造他们的宝塔，内部装有楼梯，在后来的几个世纪里主要用作瞭望塔。
