To pester someone is to keep at them until they feel worn down — usually by asking again and again. A child pestering a parent for a snack; a salesperson pestering you with calls. The sting is the repetition, not one polite request.

To pester someone是指 keep at them一直纏著某人 until they feel worn down直到對方感到疲於應付——usually by asking again and again通常是靠一次又一次地要求。A child pestering a parent for a snack像小孩纏著父母討零食；a salesperson pestering you with calls或業務員一直打電話煩你。The sting刺痛人的地方 is the repetition在於那種反覆糾纏，not one polite request而不是一次禮貌的請求。

It is informal everyday English, a little complaining in tone: the speaker usually sides with the person being asked, not the asker. You pester a person, not a thing.

It它是 informal everyday English非正式的日常英語，a little complaining in tone語氣帶點抱怨：the speaker usually sides with the person being asked說話的人通常是站在被要求那一方，not the asker而不是站在要求的人那一方。You pester a person你只會pester一個人，not a thing而不會pester一個東西。

Older English also used pester for crowding a place or getting in someone’s way, sitting close to pest, but that is not how people use it now.

Older English較早期的英語 also used pester for crowding a place or getting in someone's way也用pester來指擠滿某個地方或擋住別人的路，sitting close to pest字義上跟pest（害蟲）很接近，but that is not how people use it now但現在人們已經不這樣用它了。

In a formal letter you would not write pester; you would say keep asking or repeatedly request.

In a formal letter在正式信件裡，you would not write pester你不會寫pester；you would say keep asking or repeatedly request你會說keep asking（一直要求）或repeatedly request（反覆要求）。