旧金山州立大学的研究员凯特林·莱恩说，这是个全世界都存在的问题，她也参加了周六的会议。
The issue is the same all over the world, says Caitlin Ryan, a researcher at the San Francisco State University, who attends the meeting on Saturday.
找一个全世界都存在的问题，帮助你的邻里解决这个问题——改变世界是一个不可能完成的任务，但是你可以在家门口作一些改变。
Take a worldwide problem and solve it for somebody in your neighborhood - Changing the world is an impossible task but you can make a difference on your doorstep.
我们知道这是些大问题，我们知道这些在全世界任何一个国家都存在，但如果我们付出哪怕一小点努力，那我们遇到的人的生活就会发生细微的改变。
We understand these may be big problems, as there are in any country, but if we continue to do our little bit maybe we can make just a small difference to some of the people we encounter.
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