frontier: n. [C, usu. pl.] the most advanced or recent ideas about sth. (思想的)前沿;(知识的)新领域
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They were very excited about their work on the frontiers of medicine, for they were developing a medicine that might be able to cure lung cancer. 他们对自己在医学研究新领域的 工作感到非常兴奋,因 为他们正在研发一种可能治愈肺癌的药物。
Meaning: For a long time, the college campus has been a place to provide education and produce most advanced new technology. But it is now being completely changed into an electronic-age hot spot by the wide use of laptops, smartphones, and access to the Internet 24 hours a day.
For example: He sat in the back yard in the sun, watching a fleet of white clouds overhead. 他坐在后院晒太阳,看着天上的朵朵白云。
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Para.2 On a typical modern-day campus, where every building and most outdoor common areas offer wireless Internet access, one student takes her laptop everywhere. In class, she takes notes with it, sometimes instant-messaging or emailing friends if the professor is less than interesting. In her dorm, she instant-messages her roommate sitting just a few feet away. She is tied to her smartphone, which she even uses to text a friend who lives one floor above her, and which supplies music for walks between classes.