reigning world champion

基本解释

In 1996, IBM's Deep Blue became the first machine ever to win even a single game against the reigning world champion, Garry Kasparov.
在1996年，IBM的“深蓝”计算机成为有史以来成为赢过卫冕世界冠军卡斯帕罗夫一盘棋的首部计算机。
bbs.chinadaily.com.cn
The reigning world champion Chinese women curlers team beat host Canada 6-5 in overtime at the Winter Olympics Monday, giving Canada its first loss at the tournament after 5 straight wins.
22日，世锦赛冠军中国女子冰壶队通过加时局以6比5战胜东道主加拿大队，结束了对手在冬奥会的5连胜势头。
www.chinadaily.com.cn
The reigning world champion completed a 1500m swim in preparation for the London Triathlon later in the summer, and even he found it tough.
卫冕冠军游了1500米为之后在夏天举行的伦敦铁人三项赛做准备，连他都觉得悲催。
www.barrichello.com.cn

Driver Steve Holcomb, the reigning world champion, surged to the lead after the first two runs Friday, setting a Whistler Sliding Track record in the process.

Pole sitter and three-time reigning world champion Vettel was third in a Red Bull.
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