A campaigner is someone who works, often for a long time, to bring about a social or political change. They might collect signatures, knock on doors, speak at meetings, organise a march, or keep writing to people in power.

A campaigner is someone who worksCampaigner是指一個努力的人 often for a long time通常是長期努力 to bring about a social or political change想促成社會或政治上的改變 They might collect signatures他們可能會收集連署 knock on doors挨家挨戶敲門 speak at meetings在集會上發言 organise a march籌辦遊行 or keep writing to people in power或不斷寫信給有權力的人

You can be a campaigner for cleaner air, for animal welfare, against a new road, and so on. It is not only for famous leaders: a quiet person who shows up every weekend is a campaigner too. The word feels public and a little serious; you would not use it for a family argument at dinner.

You can be a campaigner for cleaner air, for animal welfare, against a new road你可以是為了更乾淨的空氣、為了動物福利，或反對一條新道路而努力的campaigner and so on諸如此類 It is not only for famous leaders這不只是給知名領袖用的 a quiet person who shows up every weekend is a campaigner too一個每個週末都默默出現的人，也是一個campaigner The word feels public and a little serious這個字給人公開、有點嚴肅的感覺 you would not use it for a family argument at dinner你不會用它來形容餐桌上的家庭爭吵

Though actually, in older British English an “old campaigner” could also mean someone who has been through many hard jobs or wars and knows how to cope — that sense comes from military campaigns, and you still hear it now and then.

Though actually不過，其實 in older British English an "old campaigner" could also mean someone在比較舊的英式英文裡，「an old campaigner」也可以指一個人 who has been through many hard jobs or wars and knows how to cope經歷過許多艱難工作或戰爭、知道如何應付 that sense comes from military campaigns──這個意思來自軍事的campaign（戰役） and you still hear it now and then你現在偶爾還是會聽到