So because we tested it with wheelchair users, with wheelchair manufacturers, we got that feedback from them, not just articulating their problems, but articulating their solutions, and worked together to go back to the drawing board and make a new design, which we brought back to East Africa in '09 that worked a lot better than a normal wheelchair on rough terrain, but it still didn't work well indoors because it was too big,
所以我们与轮椅使用者，轮椅制造商 一起进行测试，收集他们的建议 不仅仅是采集他们的问题，而是采集了他们认为好的解决方法 然后我们回来重新画了设计图 09年，我的团队把经过修改的样品带到了东非 新一代样品在崎岖路面上的行进效果比普通轮椅要好得多 但在室内行进效果仍然不好