请分析社会实践活动的类型及其对学生品德发展的影响。

And we do expect to grow quickly with your help, and this effort will proceed on a number of parallel tracks. First, a major applied research and development effort to improve design, lower costs, and develop global industry standards for cookstoves. There are already some good stoves out there, but we can make them much more durable, efficient, and affordable, and scale up production to reach a mass market. With the right advances, new stoves could even use their own wasted heat to produce electricity that powers smoke-clearing fans, mobile phones, and even household lights.