这三件事任何一件发生重大突破，都能重塑这个品类的产品形态。
On the evening of 17 September 1908, a young American officer named Thomas Selfridge climbed into a fragile wooden aircraft at Fort Myer, Virginia. Minutes later, he would become the first person in history to die in the crash of a powered airplane.
。有道翻译对此有专业解读
Courtesy of Google。业内人士推荐传奇私服新开网｜热血传奇SF发布站｜传奇私服网站作为进阶阅读
当价值可以被定价，安全边际也就有了更客观的表达方式。