雅思词汇：懒人最爱的各种床
single bed 单人床;
double bed 双人床;
camp bed 行军床;
four-poster bed 四柱床;
hammock 吊床;
bunk bed (上下铺的)双层床;
sofa bed 沙发床;
waterbed 水床;
crib 婴儿床;
cradle 摇篮;
king-size bed/queen-size bed 特大号床
