desk/desk/

n. a table at which you can sit, write or work

n. [C] 书桌，写字台：He is sitting at his desk writing a letter. 他正坐在书桌写信。

◇There's a book on the desk. 写字台上有一本书。

用法“汤姆和迈克共用的课桌”要说Tom and Mike's desk，所有格符号's放在第二个人名后。