人们常说“失败是成功之母”,如果没有无数次的失败作为基石,很难盖起成功的大厦,下面就是一些失败的例子,这些交通工具因种种原因都没有获得成功而得到实际应用,但通过对它们失败原因的分析,可能会给我们一些有益的启示。 It is often said that “failure is the mother of success.” If there are not many failures as the cornerstone, it is hard to build a successful mansion. Here are some failed examples. These vehicles have been put to practical use for various reasons. But an analysis of the causes of their failure may give us some helpful insights.