除非我们确信梦幻客机有能力避免失速，否则大谈能如何改进全球数百万乘客的旅行体验纯属空中楼阁。
Unless we are convinced of the Dreamliner’s ability to avoid stall speed, it makes no sense to talk about all the ways in which it will enhance the travel experience for millions of people around the world.