资料来源 : pyDict

充水床垫

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Water bed \Wa"ter bed`\
   A kind of mattress made of, or covered with, waterproof
   fabric and filled with water. It is used in hospitals for
   bedridden patients.

资料来源 : WordNet®

water bed
     n : a bed with a mattress made of strong plastic that is filled
         with water