former world的用法和样例：
例句
- Clayton Fredericks, a former world champion, said he was impressed by Alex when he started coaching him as a boy.
前世界冠军克莱顿弗雷德里科斯说，他在华天还是个男孩时开始训练他，那时就对他印象很深。 - Safin, a former world number one, has made no secret of his discomfort on grass, but he produced a magnificent display to send Djokovic packing.
前世界排名第一的萨芬从不掩饰自己在草地球场上的不爽，但是他用一次精彩的表现把德约科维奇打发回家。
