in the bed和in bed的區別

　　in the bed造句：

　　Particles swim around in the bed。顆粒在床層中到處游動。

　　There seems to be something moving in the bed。床里面好像有個什么在動。

　　Bubble size is a key factor in determining the conditions in the bed。氣泡尺寸是決定床內情況的一個關鍵因素。

　　in bed造句：

　　Mary's in bed，Don't wake her。瑪麗在床上睡覺，不要吵醒她。

　　Jerry often lies in bed and watches TV。杰瑞經常躺在床上看電視。

　　He was lying in bed talking on the phone with his girlfriend。他躺在床上和女朋友打電話。