desk不是可数名词。desk是桌子,而不是椅子,它的复数: desks;
可以说:some desks 一些桌子;some desk 某张桌子。
I always leave a clear desk at the end of the day.
每天工作结束时,我总是把桌上收拾干净不放任何东西。
The paper had fallen down between the desk and the wall.
那张纸掉在桌子和墙壁之间的缝隙里。
That desk takes up too much space.
那张桌子占的地方太大。
I spend most of my working day sitting at a desk.
我一天之中大部分工作时间都坐在办公桌旁。