双簧管音域:bunk beds 是复数还是单数
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复数
bunk bed
n.(附有梯子的)双层床
bunk bed
n
上下床,双层床
bunk bed
n.
Either of a pair of narrow beds stacked one on top of the other.
bunk bed
n.
Either of a pair of narrow beds stacked one on top of the other.
附有梯子的双层床一张架在另一张上的两张狭窄的小床