短语词组短语Single Double Bed 人床;孤单双人床single indeed bed 单人床single fluidized bed reactor 单级流化床反应器Subdividing single sand bed 细分单砂层Single -bed Room 单人房间;单床间single sand bed 单砂层Single adsorbent bed 单吸附床single e bed 单人床;单床房 返回 single bed