Governments in developing countries have been doing this for decades, and it's only now, with more evidence and new technology that it's possible to make this a model for delivering aid.
发展中国家的政府 数十年来一直是这么做的， 随着科技不断发展， 种种迹象表明， 用这种方式来传递帮助到如今才成为可能。