卧病在床: be sick abed; be confined to (one's) bed by sickness; be ill abed [in bed]; be laid up with illness; be lying ill; stay in bed; take to one's bed
卧病不起: be on one's back = be ill in bedbe on one's back(=be ill in bed)be on one’s back(=be ill in b ed)be on one’s back(=be ill in bed)
床: i 名1.(供人睡觉的家具) bed; couch 短语和例子单[双]人床 single [double] bed; 吊床 suspended bed; hammock; 帆布[折叠] 床 camp [folding] bed; 小孩床 child's cot; baby's crib;卧病在床take to one's bed; be laid up in bed; 上床