the student is sitting at his desk 为什么用at?

the student is sitting at his desk 为什么用at? his father is sitting at the desk,reading a story-book.中为什么用 The student is sitting at his desk.这些学生是坐在他的办公旧.麻烦问下我翻译的对不. His father is sitting at the desk, _______ a story-book.&nbs 关于seat sitHe is seated at the desk.=He is sitting at the des 英语翻译Doalogue (At the Registration Desk)A foreign student is A kid is sitting at his desk when suddenly there is a puddle Sitting at the table.介词为什么用at? A father was sitting at his desk and looking at bills when h A father was sitting at his desk and looking at bills(账单) wh He spent all day at his desk.为什么不是on the desk sitting at the table