美国有线新闻 CNN 12岁女孩创意发明 检测水中铅含量（在线收听）

According to the World Health Organization, which is part of the United Nations, more than 2 billion people around the world don’t have clean drinking water in their homes. That’s about 28 percent of the entire world’s population.

世界卫生组织隶属于，据世界卫生组织称，全世界有超过20亿人(约占全世界人口的28%)没有干净的饮用水。

And one threat that can hide in water is lead. It’s a toxic metal the U.S. government says no amount of it is safe, but there are some people working on ways to help others avoid it.

水中的一个潜在的威胁是铅。这是一种有毒的金属，美国政府说少量的铅不会造成危险的，但是有一些人正在设法帮助其他人避免这种物质。

GITANJALI RAO, INVENTOR: My name is Gitanjali Rao. I am 12 years old. I’m in seventh grade and I go to STEM School Highlands Ridge.

我的名字是Gitanjali Rao。今年12岁，上七年级，在STEM学校就读。

So I developed a device to detect lead in water fashioned in current techniques out there today. It uses nanotube-based sensor in order to give you instantaneous results on your smart phone of safe, slightly contaminated or critical of the lead status in your water.

所以我发明了一种仪器，可以检测出当今技术中的铅。它使用基于纳米管的传感器，以便在智能手机上立即获得水是安全、轻微污染或铅超标的及时反馈。

I was originally introduced to the Flint water crisis through a STEM lab. And it was just appalling to see the number of people who were affected by lead in water.

我最初是通过一个STEM实验室接触到Flint水危机的，看到很多人受到水里铅的影响，真是令人震惊。

I partnered with Denver Water and I am working on performing my tests and doing research there. So, at this point, I am working on redesigning the device structure, refining my sensors, adding various tables and charts for more accurate values.

我和Denver Water公司合作，我正在做我的测试并在那里做研究。因此，我正在重新设计设备结构，改进传感器，为更精确的值添加各种表格和图表。

I want to see this in the market so that every -- it’s in everyone’s hands in the next year.

我想在市场上可以看到这个设备——这样明年每个人就都可以拥有了。