Germany's Martin Kaymer won the PGA Championship last year.

德国人马丁-凯梅尔赢得去年的美国职业高尔夫锦标赛冠军。

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Germany's Martin Kaymer won the PGA Championship last year. South Africa's Louis Oosthuizen won the British Open. And South African Charl Schwartzel won the Masters in April.

德国人马丁-凯梅尔赢得去年的美国职业高尔夫锦标赛冠军。南非选手路易-乌修仁赢得了英国公开赛冠军。而南非选手查尔-舒瓦特·泽尔赢得了四月份举办的名人赛冠军。

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Germany's Martin Kaymer won the PGA Championship last year.

VOA: special.2011.06.18

Martin Kaymer won the 2010 PGA Championship but lasted in the top spot only eight weeks.

WSJ: McIlroy,Donald and Westwood: How Golf Crowns Its World No. 1 | Golf Journal by John Paul Newport

Westwood has been paired with Martin Kaymer against Phil Mickelson and Dustin Johnson in the first fourball.

BBC: Ryder Cup 2010: Westwood aims to lead Europe by example

Mickelson, Woods and USPGA champion Martin Kaymer all have a chance to take Westwood's number one spot this week.

BBC: Lee Westwood & Phil Mickelson paired at HSBC Champions