Hannah, Do you know why you asked this question? One of the reasons might be that you rely too much on Chinese-English dictionary, I am assuming there is no any Chinese-Persian or Persian-Chinese dictionary available for your guys. 层：layer ===〉 level, floor in a building You know why??? Just imagine, the floors of a high-rise building are just like the layers of an onion, Onions are peeled off layer by layer Buildings are piled up floor by floor Which floor do you live on? 你住几楼？你住几层？ The second floor. 2楼 or 2 层 地：The earth, field, ground, floor, land, place...... 地面：ground 地板：floor A：What type of floor do you have in your home? 你家里使用什么地板？ B：Ceramic tile flooring for the ground floor 一层（楼）是地砖 Real wood flooring for the second floor 二层（楼）是木地板 Carpet flooring for the top floor 顶层（楼）是地毯

层: layer 地: ground

اگه دوست داری، من يک نسخۀ فرهنگ فارسی به چينی تو کاپيوترم دارم، اگه ممکن باشه می فرستم از طريق اينترنت. ولی يه نکتۀ ضعيف آن برای بخش چينی پين اين نيست.

but in my chinese book writes 层 and 地 both of them meaning floor!