VOA慢速英语:Scientists Develop Smartphone App for Eye Exams

短语讲解：

1. The World Health Organization says nine out of ten of them live in developing countries.

developing countries发展中国家
例句：The developing countries share the same fundamental interests.
发展中国家的根本利益是一致的。

2. They call it Netra, which means eye in Sanskrit but stands for Near Eye Tool for Refractive Assessment.

stand for代表, 表示
例句：UN stands for the United Nations.
UN是联合国的缩写。

3. The user looks into the eyepiece and uses the buttons on the phone to move two lines until they appear as one.

look into深入地检查,研究
例句：Step by step did he look into the construction of the singular abode. 
他逐一细看这艘独特的船只上的陈设。

4. The person's vision problem is identified by the number of clicks required to line up the images.

line up排成一行
例句：Line up these men and see if the witness can recognize the criminal.
让这些人站成一排看看见证人能否从中把罪犯认出来。

5. These creative methods that people have come up with by using wireless technology will be able to be accessed by millions of people, whereas other technology using electricity and landlines would not have been that accessible.

come up with想出, 提出
例句：I hope you can come up with a better plan than this.
我希望你们能提出一个比这个更好的计划。