#VOA常速英语听力：UN Warns Against Land Degradation 搜索结果
VOA常速英语听力：UNWarnsAgainstLandDegradation点击试听：UNWarnsAgainstLandDegradationoeDeCapuaDecember16,2011Photo:UnitedNationsWaterscarcitycanleadtobothdroughtanddesertificat
