机の上

on the desk

→ 机
phrase Common #3,527
on the desk Literally means “the top of the desk”; commonly used to describe something located on the desk’s surface.
JA: 鍵は机の上にあります。
EN: The key is on the desk.

私は机の上を片付けた。

I tidied up my desk.

君の時計は机の上だよ。

Your watch is on the desk.

「あなたの本はどこですか」「机の上です」

“Where is your book?” “It’s on the desk.”

その本なら、俺の机の上だよ。

That book is on my desk.