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　　1.要??(yao)避??(bi)免??(mian)直??(zhi)接??(jie)接??(jie)觸??(chu)　　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??(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)??。??。