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　　風??(feng)媒??(mei)花??(hua)粉??(fen)指??(zhi)借??(jie)助??(zhu)風??(feng)力?(li)傳??(chuan)播??(bo)授??(shou)粉??(fen)的??(de)花??(hua)粉??(fen)??，一??(yi)般??(ban)花??(hua)粉??(fen)粒??(li)小??(xiao)、質(zhì)??(zhi)輕?(qing)、量??(liang)多??(duo)??，如?(ru)柏??(bai)樹??(shu)、楊??(yang)樹?(shu)、柳?(liu)樹??(shu)、樺??(hua)樹?(shu)、梧??(wu)桐??(tong)等??(deng)；它??(ta)的??(de)特??(te)點??(dian)是??(shi)花??(hua)型??(xing)較??(jiao)小?(xiao)、色??(se)淺??(qian)、無??(wu)香?(xiang)味??(wei)??，數(shù)??(shu)量?(liang)多??(duo)??，花?(hua)粉??(fen)傳??(chuan)播??(bo)面??(mian)積??(ji)很??(hen)廣??(guang)、在??(zai)空??(kong)氣??(qi)中??(zhong)停??(ting)留??(liu)時??(shi)間??(jian)長??(chang)??。??　　北??(bei)京??(jing)市??(shi)疾??(ji)控??(kong)中??(zhong)心??(xin)建??(jian)議??(yi)花??(hua)粉??(fen)過??(guo)敏??(min)者?(zhe)外??(wai)出??(chu)時??(shi)加??(jia)強??(qiang)防??(fang)護??(hu)??。?UNKYQJVSRJqibao666888　　feng ??(feng)mei ??(mei)hua ??(hua)fen ??(fen)zhi ??(zhi)jie ??(jie)zhu ??(zhu)feng ??(feng)li ?(li)chuan ??(chuan)bo ??(bo)shou ??(shou)fen ??(fen)de ??(de)hua ??(hua)fen ??(fen)??，yi ??(yi)ban ??(ban)hua ??(hua)fen ??(fen)li ??(li)xiao ??(xiao)、zhi ??(zhi)qing ?(qing)、liang ??(liang)duo ??(duo)??，ru ?(ru)bai ??(bai)shu ??(shu)、yang ??(yang)shu ?(shu)、liu ?(liu)shu ??(shu)、hua ??(hua)shu ?(shu)、wu ??(wu)tong ??(tong)deng ??(deng)；ta ??(ta)de ??(de)te ??(te)dian ??(dian)shi ??(shi)hua ??(hua)xing ??(xing)jiao ??(jiao)xiao ?(xiao)、se ??(se)qian ??(qian)、wu ??(wu)xiang ?(xiang)wei ??(wei)??，shu ??(shu)liang ?(liang)duo ??(duo)??，hua ?(hua)fen ??(fen)chuan ??(chuan)bo ??(bo)mian ??(mian)ji ??(ji)hen ??(hen)guang ??(guang)、zai ??(zai)kong ??(kong)qi ??(qi)zhong ??(zhong)ting ??(ting)liu ??(liu)shi ??(shi)jian ??(jian)chang ??(chang)??。??　　bei ??(bei)jing ??(jing)shi ??(shi)ji ??(ji)kong ??(kong)zhong ??(zhong)xin ??(xin)jian ??(jian)yi ??(yi)hua ??(hua)fen ??(fen)guo ??(guo)min ??(min)zhe ?(zhe)wai ??(wai)chu ??(chu)shi ??(shi)jia ??(jia)qiang ??(qiang)fang ??(fang)hu ??(hu)??。?