2.had it not been for the development of metamaterials:如果超材料尚未得到开发的话。该句使用的是虚拟过去时的倒装结构。虚拟过去时表示与过去事实相反的假设;因为是倒装结构,所以将情态动词had提到主语之前。如使用正常语序,该句可写为....if it had not been for the development of metamaterials. 3.metameans beyond, and metamaterials can do things beyond what we see in the natural world-like shuffle light waves around an object,and then bring them back together:meta的词义是超越,metamaterials能做出我们在自然界看不到的事情,例如将光波移动到某个物体周围,然后将光波全部收回。 4.Louisiana Tech University in Ruston,Louisiana:路易斯安那理工大学,位于路易斯安那州拉斯顿市。该校为公立大学,1894年建校,是美国最为重要的研究型大学之一。 5.the Polytechnic University of Valencia in Spain:瓦伦西亚理工大学,位于西班牙东南部的瓦伦西亚市,该校建于1968年。 6.oil rigs:石油钻塔 练习: 1.What is true for metamaterials? A.They will always remain in science fiction. B.They are already a reality. C.They are nonexistent in nature. D.Scientists begin to use them to build invisible cloaks. |