听力练习

【NPR边听边练】致力于提供新鲜有趣、饶有意味的时讯资料，致力于通过精听的方式促进听力提高，致力于不断开阔眼界和深入了解美国观点。

精听建议：
先完整地把一条新闻听一到三遍，争取掌握大意。然后，一句一句精听，力争每句话都听明白。遇到实在不懂的地方，再听写。

下面的文本材料中空缺部分里面要填的词都很简单，不过是一些值得注意的连读或者典型的美式发音哦，有些语速比较快。试试看，你能不能全部写对？

（参考文本，欢迎指出错误^^）

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 (更正确地), 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 (费力地) 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___."

词汇解析

1.imagine [i'mædʒin]

v. 想像,幻想,猜测

例句与用法:
I can't imagine that anyone cares what I do.
我想不出谁会关心我的所作所为。
You can imagine how surprised I was.
你可以想象我是多么惊讶。
He imagines that people don't like him, but they do.
他以为人们不喜欢他，但他们是喜欢他的。

2.drop [drɔp]

n. 滴,微量,落下
v. 放下,掉下

a drop of water 一滴水

例句与用法:
Drops of supplies are being made to villages still cut off by the snow.
目前正向大雪隔绝的村庄空投生活用品。
I hear they've dropped over ten thousand on the deal.
我听说他们那笔交易损失了一万多块钱。
He has taken a drop too much.
他喝太多（酒）了。

3.addition [ə'diʃən]

n. 增加,附加物,加,加法

In addition to 除...之外(还)

例句与用法:
In addition to a diet, she pursues various exercises on TV.
节食以外她还随电视做体操。
In addition to an album, I gave him a pen and a pencil.
除了一本照相簿外, 我还给了他一支钢笔和一支铅笔。
Addition and division are forms of computation.
加法和除法都是计算方法.
Ann will be a very useful addition to our team.
安来到我们队给我们增加了一员干将。