translation.en: Amy Smith: Some of the other things we're working on are ways to do low-cost water quality testing, so that communities can maintain their own water systems, know when they're working, know when they treat them, etc.
translation.zh: 艾米.史密斯：现在我们在研究 低成本水质测试法 帮助社区维护水系统 使他们知道他们的系统什么时候有效，什么时候需要清洁处理等等