They went around painting rude slogans on cars.他们到处在汽车上涂写粗鲁的标语。Big placards beating welcome slogans are posted along the street.沿街排列着许多大的欢迎标语牌....neon slogans which light up the city by night.夜晚照亮整个城市的霓虹灯广告They sent deat...
Lectin is a large molecule glucoprotein and can agglomerate the cell.凝集素是一种能作用于细胞使其凝聚的大分子物质,大多属糖蛋白.The structure of the chlorophyll molecule is known . It consists ofporphyrin.叶绿素的分子结构已经搞清, 它是由卟啉组成的.Scientists call this ...