How to use this idiom?

Just because there is a little thing in my mind, look at the example:

Students should unite and help each other, and never quarrel over a trivial matter.

Idiom: hold a grudge

Pinyin: g and ng g and ng y ú huá i

Explanation: upset: something is on my mind. I can't forget it.

Source: The Book of Songs White Boat: "If you are worried, if you have hidden concerns."

Example: Students should unite and help each other, never because of a trivial matter.

Synonyms: caring, persistent, persistent.

Antonym: There is nothing in my arms.

Grammar: formal; As predicate and attribute; Refers to things that cannot be forgotten.