The school canteen has posted a notice because the teacher's lunch window is often occupied by students. This window should beat the teacher first, then the students.

An ambiguity occurred, and the last two sentences were changed to "Teachers in this window have priority in preparing food, followed by students."

Semantic error: "beat" is a polysemous word, including beating and beating. It also means buying and selling food. Polysemy can easily lead to misunderstandings. Grammatical errors: In a specific language environment, giving food to teachers and students. The verb "beat" takes two objects, one is the direct object "meal", the other is the indirect object "meal", and the other is the indirect object "teacher" and "student". This notice omits the direct object and can easily cause misunderstandings. .

Reference: Baidu