Noun:

1. any of several trees of the genus Populus having leaves on flattened stalks so that they flutter in the lightest wind

asperityn.刻薄；严厉；(气候等的)严酷；粗糙aspectn.方面；方位；外观；外貌Aspendal阿斯彭达尔Aspengren阿斯彭格伦Aspenberg阿斯彭贝里aspen APMP杨木APMPaspen pulp杨木浆aspen wood山杨木aspen CTMP杨木CTMPaspen BCTMP杨木BCTMPaspen hybrid山杨杂种aspen leaves加杨叶

1. This was the subject of a combative discussion this week at the Aspen Ideas Festival.
   这个问题成了本周在科罗拉多州举行的白杨思想节中激烈讨论的主题。