There are two main problems which afflict people with hearing impairments.听力有障碍的人们主要受到两大问题的困扰。Famine and war still afflict mankind.饥饿和战争仍使人类遭受痛苦.New medical technology will cure more ailments that afflict humanity.新的医学技术...
不同类别的化石是以不同的方式保存下来的 ― ―有的如同模型或模压品.Different fossils have been preserved in different ways - some as moulds or casts.后模压工艺是相当严格的.The postmolding process is relatively harsh.他研究调制油墨的方法,使字模压上去时,油墨不致溅开.He learned to mix ink ...