There was a drift of smoke above the trees.树林上空飘浮着一股烟。As rural factories shed labour, people drift towards the cities.由于农村的工厂纷纷裁员，人们逐渐流向城市。Here and there a drift across the road was wet and slushy.路上不时会有吹聚起的积雪，泥泞而湿滑。...
锕类任何化学性质相似, 原子序数在89 ( 锕 ) 与103 ( 铹 ) 之间变化的放射性元素.Any of a series of chemically similar, radioactive elements with atomic numbers ranging from 89 ( actinium ) through 103 ( lawrencium )....