By Kurt Achin Gwangju, South Korea 19 June 2006 North and South Koreans recently marked the anniversary of the start of efforts to bring decades of animosity to an end. Six years ago, leaders of both countries met for the first and only time. The su

发表于:2019-01-11 / 阅读(156) / 评论(0) 分类 2006年VOA标准英语(六月)

Salt vs. Ice 食盐大战冰块 Y: Why does salt melt ice? D: It lowers the melting and freezing point of water. Y: Oh,OK.Wait,I don't get it. Doesn't that mean the salt make ice colder? D: Let me explain.Pure water freezes at thirty-two degrees Fahr

发表于:2019-01-26 / 阅读(99) / 评论(0) 分类 英语听力文摘 English Digest

南极地衣 南极地衣是地球上最古老的植物之一,是一类原始型的低等植物,它能适应南极洲那种沙漠般的干燥和极度寒冷的环境,所以它是分布最广、种类最多的南极土著植物。它主要分布于

发表于:2019-02-24 / 阅读(117) / 评论(0) 分类 英语听力文摘 English Digest