山桂兰（Paramichelia baillonii Hu.），木兰科，俗称拟含笑，大果白兰、合果木山桂花为云南特有树种，主要分布于云南省热带亚热带地区。其生长快，材质优良，是值得推广的优良速生乡土阔叶树种。它还是优良珍贵速生阔叶用材树种，干形通直、圆满，木材结构细，翘曲开裂现象少，耐腐抗虫，为建筑、家具等的优良用材。
据新浪报道，其中一个原因是王桂兰每天至少要跑20公里。
One reason, according to Sina, is that Wang Guilan runs at least 20 kilometers every day.
大多数人退休后都会选择放松一下，但来自辽宁的王桂兰肯定不是这样的人。
Most people choose to take it easy after they retire, but Wang Guilan, from Liaoning, is certainly not one of them.
“这太令人惊讶了，”一位20多岁的跑步者在4月份观看了王桂兰参加辽宁马拉松比赛后表示。
"That's surprising," a runner in his twenties said after seeing Wang compete in the Liaoning marathon in April.
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