characteristic gas特征气体characteristicn.特点；特性；特色adj.典型的；特有的characteristics of regulating valve调节阀characteristics of natural heritage自然遗产的特征characteristic of normal university师范特色Characteristics and use of fructose果糖的特性及应用characteristics of dam construetion筑坝特点characteristic einstein temperature爱因斯坦特章度characteristic chemical constituent特征性成分characteristic parameter of aft lip后唇口型线特征参数characteristics of etiquette crimes礼仪犯罪的特点characteristics of modern education现代教育特征