她从小梯子上下来，发现祖父的床是空的，就跑了出去。
Coming down the little ladder and finding the grandfather's bed empty, she ran outside.
原来是两张并列的床，几个月之后，做成了上下铺，比较节省地方。
They started as side-by-side beds, then after a few months we made them into bunks to get a bit of floor space back.
我有两个大卧室，一间卧室里有张双人床，另一间卧室里有一张加大双人床和一张上下床，我的两个侄子每次和他们父母来看我的时候都用这个上下铺！
I have two large bedrooms, one with a double bed, the other with a king-size bed and a bunk bed which my nephews use when they come to visit me with their mum and dad!
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