英语翻译
原文如下：
the Kenyan athlete David Rudisha won the men's 800m final in the new world record time 1:40.91.A wave from the track,British Nicola Adams became the first Olympic women's boxing champion.And in thelightweight category,Ireland's Kitty Taylor won her country's first gold medal of the Games.But Afghanistan'smost promising Olympic competitor Rohullah Nikpah lost in the quarter finals of taekwondo .