The clockwork Radio British inventor,Trevor Baylis,was listening to a radio programme one day about

问题描述:

The clockwork Radio British inventor,Trevor Baylis,was listening to a radio programme one day about

英国发明家,Trevor Baylis,一天正在收听一个关于非洲健康问题的节目.他认识到一个收音机能在多大程度上帮助到非洲人民来了解学习健康以及健康护理