桌

桌

"Table" or "desk."

Here, '桌子' refers to a physical desk or table used in the classroom setting.

在教室里有一张桌子。

There is a desk in the classroom.

In this sentence, '桌上' specifies the surface of the table, denoting location.

他把书放在桌上。

He placed the book on the table.

'桌前' describes the position near the table, indicating a setting or activity performed there.

我们晚上在桌前吃饭。

We have dinner sitting at the table in the evening.