What do you mean the teacher smiled?

When a teacher laughs, it means that the teacher is embarrassed, which is often used as a courtesy.

Draw ridicule (for poor performance)

Pinyin [Jian Xiao]

Explain (move) (be told) a joke (often used as a polite expression)

The example is not well done and makes you laugh.

Synonym joke

joke

Pinyin [Western Australian dialect]

Commentary (name) refers to a dialogue or story that can make people laugh. (moving) sneer.

From the anonymous biography of the Tang Dynasty: "Zhao sneaked into the west of the ancient temple, and it was clear at night, and three beautiful women came to see the joke."

Synonymous laughter