单词：
单词： 相关文章
For more than ten years of his life Nick Wilkins fought leukemia. It was a heartbreaking time for his parents. But now at 15, Nick is cancer-free thanks to a new experimental therapy. Nick went through many kinds of treatment: chemotherapy, radiation
轻松英文阅读
这看起来像是我们的祖先懂得收集有着锋利边缘，可以用来切肉的工具，就好像小孩子们懂得挑选扁平的石头用来打水漂一样。但是未来的考古工作致力于寻找把石头塑造成厨具的工具。相信
60秒科学
Theres nothing like a good steak. And our Australopithecus afarensis ancestors apparently felt the same way. Because new discoveries from Ethiopia show that what was likely the species of the famous fossil Lucy used stone tools to butcher meat from b
Scientific American(八)月
A lean，hungry wolf met with a plump，well－fed house dog on amoonshiny night．How is it that you look so sleek？asked the wolf．Your food obviously agrees with you，while I can hardly keep myself from starving however hard I try． Well，if
趣味英语
Lesson 33 The Pretty Pigeon 第33课 美丽的鸽子 I am sure that you all know a pigeon when you see one, and that you like and admire this pretty bird. 小朋友, 你们看见鸽子, 一定都认识吧? 你们也一定都喜欢、珍爱这种美丽的
英国学生科学读本
Agnes Obel，来自丹麦的美人鱼。今年世博会丹麦馆的演出中，也许有人已经体会过她美妙的歌声了 Artist：Agnes Obel Song：Riverside Down by the river by the boats Where everybody goes to be alone Where you wont see an
金属