化学家能把一种药物的各种成分分解出来.A chemist can separate a medicine into its components.化学家用电解法把水还原为氢.The chemist reduced water by electrolysis.了解这些稀有分子能帮助化学家找到可实现的目标。Understanding these rare molecules will help chemists to find out wh...
他用右手抓住了一块凸起的岩石。He grabbed at a protrusion of rock with his right hand.裂缝、凸起、剥落的勾缝和湿斑都意味着存在问题。Cracks, bulges, crumbling pointing and damp patches mean trouble.海伦的双手枯瘦，青筋凸起。Helen's hands were thin and veined....