in bed在床上；卧床

go to bed上床睡觉

fluidized bed[化]流化床；流动层

on the bed在床上

coal bed煤层；煤床

went to bed上床睡觉

fixed bed[化]固定床

in the bed在床上

stay in bed卧病在床，卧床；呆在床上；在床休息

test bed n. 试验台

river bed河床

moving bed[化]移动床；活动底

fluid bed流化床；怜床

packed bed填充层

under the bed在床下，在床底下

double bed双人床

fluidized bed reactor流化床反应器；怜床反应堆

get out of bed起床，从床里出来

sea bed海底；海床

circulating fluidized bed boiler循环流化床锅炉；循环怜床锅炉