champion 有两个核心用法：① 名词「冠军，胜利者」：a world champion（世界冠军）；defending champion（卫冕冠军）；② 名词/动词「倡导者；积极捍卫/倡导」：a champion of sth.（某事业的倡导者：a champion of human rights = 人权倡导者）；champion sth./sb.（倡导，捍卫：champion the rights of workers = 捍卫工人权利；champion a cause = 为某事业倡导）。关键辨析：champion（倡导者，积极推动，含正面价值观）vs. advocate（倡导，更广泛，可为任何观点）。
释义
1
n.冠军，得胜者（竞赛）
At just nineteen years old, she became the youngest champion in the history of the international chess tournament.
年仅十九岁，她成为了国际象棋锦标赛历史上最年轻的冠军。
2
n.倡导者，捍卫者（某事业）
Throughout her career, she was an outspoken champion of gender equality, advocating for equal pay and opportunities in the workplace.
在整个职业生涯中，她是性别平等的直言不讳的倡导者，倡导职场同等薪酬和机会。
3
v.积极倡导，捍卫（某事业/某群体）
The newly elected senator pledged to champion the interests of low-income families by reforming the tax system.
新当选的参议员承诺通过改革税收制度来积极维护低收入家庭的利益。
语感
world champion（世界冠军）；defending champion（卫冕冠军）；a champion of（…的倡导者）；champion sth.（倡导某事）
冠军，得胜者（名词）倡导者，捍卫者（名词）积极倡导（动词）
高频搭配：world / national / defending champion（世界/全国/卫冕冠军）；championship（冠军赛：win the championship = 赢得冠军赛）；a champion of human rights / equality / free speech（人权/平等/言论自由的倡导者）；champion sth./sb.（倡导：champion a cause = 为某事业倡导；champion the rights of minorities = 倡导少数群体权利）；champion for change（变革的倡导者）。辨析：champion（积极捍卫，含强烈正面价值观取向，常用于权利/公正/弱势群体）vs. advocate（倡导，更中性，可倡导任何观点：advocate for stricter laws = 倡导更严格法律）vs. promote（推广，推动，更中性：promote diversity = 推广多样性）。
陷阱
⚠️champion（倡导者，积极捍卫）vs. advocate（倡导，更中性）——价值取向不同
The organisation has long championed the rights of refugees, pushing for policies that recognise their legal status and ensure their safety.
✗
championed = advocated（champion 和 advocate 完全一样）
✓
champion（强调积极、热情地捍卫某正面价值，常用于人权/弱势群体/公正：champion the rights of... = 积极捍卫…的权利）；advocate（更广泛，较中性：advocate for stricter immigration controls = 倡导更严格的移民控制，可以是任何观点）；champion 含「持续热情」义，多用于正面/道义的事业；此句 championed the rights 强调长期积极捍卫，正确
The tennis player is looking to defend her title after winning the defending championship last year.
这位网球运动员希望在去年赢得卫冕冠军后再次捍卫头衔。（× defending championship → ✓ the defending champion，指人）
defending champion = 卫冕冠军（在位冠军）；× defending championship 不是标准表达（championship = 冠军赛/头衔，不是人）；the defending champion（卫冕冠军，指人）；defend the title / defend the championship（捍卫头衔/冠军地位）
✓
The tennis player is looking to defend her title after becoming defending champion last year.
这位网球运动员在去年成为卫冕冠军后，正寻求再次捍卫头衔。
近义辨析
championvsadvocate
championchampion（倡导者/积极倡导，含强烈正面价值观：champion human rights = 积极捍卫人权；a champion of equality = 平等倡导者）advocateadvocate（倡导，倡议者：advocate for change = 倡导变革；an advocate for stricter regulation = 更严格法规的倡导者；比 champion 更中性，不一定含道义色彩）
Throughout his career, he championed the cause of the urban poor, fighting tirelessly for housing rights and access to healthcare.
在整个职业生涯中，他积极捍卫城市贫困人口的事业，不懈地为住房权利和医疗保障而斗争。
Several leading economists have advocated for higher interest rates as the most effective way to bring inflation under control.
几位顶尖经济学家倡导提高利率，认为这是控制通货膨胀最有效的方式。
写作加分
✨ 加分词
替换：supportfight fordefend
社会公正话题政治话题教育话题
普通
Some leaders fight for the rights of disadvantaged groups.
一些领导人为弱势群体的权利而斗争。
加分 ✨
Effective political leaders must be willing to champion the rights of marginalised communities, even when doing so is unpopular or politically costly.
有效的政治领导人必须愿意积极捍卫边缘化社区的权利，即使这样做不受欢迎或代价高昂。
为什么更好：champion 比 fight for 更书面学术（fight 口语化）；marginalised communities 比 disadvantaged groups 更准确；even when...unpopular or politically costly 引入让步结构