故可以说：There is a computer on the desk.
基本规则是：There+be+物体或人+地点状语
卧室电脑桌书架效果图Bookshelf effect map of the bedroom computer desk
effect英[ɪˈfekt]美[ɪˈfɛkt]
n.效果影响印象所有物
vt.使发生引起产生（效果）
解题思路：可以从自己的房间出发，里面有什么装饰，如灯光，墙壁等，范文如下：
My bedroom is very beautiful。Roof have a lamp that droplight，shaped like a moon，andlike as rocking the cradle。On the wall is blue，metope is pink，the atmosphere is very differentcompared to the sitting room in the house and looked very sweet。
There are a lot of books inthe bookcase，l have time to read，books can let me learn a lot of knowledge。My wardrobe isthe shape of a small animal。
There is my lovely bed，is fluctuation bed，it is a place to sleep，sleep very comfortable，here is a computer desk，computer desk is under the drawer，drawercan push to various places，in addition，my bed there is a very lovely small alarm clock。
His roleis to wake me up every morning。I also lay on the bed of a lot of beautiful toys，is one of thesmall dolphin，it fluffy, look very cute。
翻译如下：
我的卧室很漂亮。屋顶上有一盏吊灯，形状像个月亮，又像摇篮一样摇动着。墙顶是蓝色的，墙面上是粉色的，屋里的气氛跟客厅相比很不一样，显得非常温馨。
书柜里有很多的书，我有时间便读书，书能让我了解很多的知识。我的衣柜是小动物形状的。还有我那漂亮的床，是上下床，上面是睡觉的地方，睡觉很舒服，下面是电脑桌，电脑桌的底下是抽屉，抽屉能推到各种地方。
另外，我的床头上还有一个很漂亮的小闹钟，他的作用就是每天早上叫我起床。我的床边上还摆着许多漂亮的玩具，其中有一个是小海豚，它毛绒我的，样子十分可爱。
