45.The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Suns very center. It is here that is to be found the source of the energy that the Sun constantly pours out i

发表于:2018-11-28 / 阅读(335) / 评论(0) 分类 新概念优美背诵短文50篇

Samantha Power On Civil Society 萨曼莎鲍尔谈公民社会 The end of the Cold War ushered in an era of unprecedented growth in democracy and with it civil society. But in recent years, democratic growth has stagnated, said U.S. United Nations Am

发表于:2018-12-16 / 阅读(45) / 评论(0) 分类 VOA标准英语2014年(二月)