translation.en: And the other key thing that we did was make this box run off a USB key, because we realized that even though there was GPRS and all that on paper, at least, in theory, it was much more efficient to send the data on a little USB key by surface mail.
translation.zh: 我们做的另外一件很关键的事情是 给它设计了一个USB接口，因为我们意识到 纵使有GPRS信号，和论文里面都有的东西， 至少理论上更有效的方式是 用U盘传送数据