【NPR邊聽邊練】致力于提供新鮮有趣、饒有意味的時(shí)訊資料，致力于通過精聽的方式促進(jìn)聽力提高，致力于不斷開闊眼界和深入了解美國觀點(diǎn)。

精聽建議：
先完整地把一條新聞聽一到三遍，爭取掌握大意。然后，一句一句精聽，力爭每句話都聽明白。遇到實(shí)在不懂的地方，再聽寫。

下面的文本材料中空缺部分里面要填的詞都很簡單，不過是一些值得注意的連讀或者典型的美式發(fā)音哦，有些語速比較快。試試看，你能不能全部寫對(duì)？

（參考文本，歡迎指出錯(cuò)誤^^）

Take a second and imagine one of those yellow yellow smiley faces. ___1___, now imagine 50 billion smiley faces floating in a drop of water. That is what scientists are made, have made rather (更正確地), using DNA. It turns out that ___2___ our genetic code and being a basic building block of life, DNA is also great for making incredibly tiny structures. NPR's Nell Boyce reports.

For years ___3___ have been using DNA to build really simple shapes like cubes that are 1,000 times thinner than a human hair. They've done it by laboriously (費(fèi)力地) designing small snippets of DNA that will ___4___ into the desired form. But a new method for building things with DNA is so much faster and easier. Even a high school student could think up a shape like a star or snowflake, and then make a DNA version within a week. Paul Rothemund came up with the idea at the California Institute of Technology in Pasadena. "Even by the time I was making smiley faces, I didn't really believe that the method worked ___5___."

來源:可可英語 http://www.ccdyzl.cn/Article/200904/67507.shtml