公共交通起辅助的作用。Public transportation plays a subsidiary role.它提供辅助的食物.It was an accessory food supply.公共交通起辅助的作用.Public transportation played a subsidiary role....
Therefore , one cannot ignore the contribution of biogenic volatile organic compounds to the secondary organic aerosols.二次有机气溶胶由于其对环境 、 气候和人体健康的影响,正日益受到人们的关注.Dihydroxyindole is an important intermediate of melanin, amino...