卫冕冠军的英文：
defending champion
reigning champion

参考例句：

India had to struggle to beat defending champions South Korea 2-0.
印度队苦战之下才以 2 比 0 击败卫冕冠军韩国队。

The challenger leveled the champion with a mighty uppercut.
挑战者用一记有力的上钩拳把卫冕冠军击倒在地

Cuba heat China 15-4,16-14,15-12 to retain their women's World Volleyball Championship on Thursday in Osaka,Japan.
星期四,在日本大阪举行的世界女排锦标赛中,古巴队以15:4,16:14,15:12击败中国队,成功卫冕冠军。

He converted the penalty to seal a 2-1 home win for Juventus that took the defending champions to the top of Serie A.
他罚球命中,将比分锁定在2-1,使卫冕冠军尤文图斯队取得主场胜利,居于A组首位。

defending是什么意思：
v. 保卫某人、某事物；为支持某人、某事而行动、说话或写文章；‘防守；参加卫冕的比赛

The judge find for the defendant
法官裁决对被告有利

The judge find for the defendant.
法官裁决对被告有利。

It is a scandal that the defendant was declared innocent.
宣判被告无罪，这真是可耻的事。

champion是什么意思：
n. 冠军；拥护者；战士
v. 支持；拥护
adj. 优胜的；第一流的

He passionately championed the poor.
他满腔热情地捍卫穷人的利益。

The challenger outweighed the champion.
挑战者的体重重过冠军。

The undisputed champion,winner,etc
无可争辩的冠军、优胜者等

reigning是什么意思：
n. 支配，统治，统治时期
v. 支配，当政，统治，君临

The revolution was followed by a reign of terror.
革命之后随即出现了恐怖统治。

The reigning ideals are transparency and accountability.
现在的主导理念是透明度和可说明性。

They will reign for ever and ever.
他们要作王，直到永远永远。