translation.en: Last year, I told you the story, in seven minutes, of Project Orion, which was this very implausible technology that technically could have worked, but it had this one-year political window where it could have happened.
translation.zh: 去年我花了7分钟时间讲了讲“猎户座计划”， 确实是异想天开的技术 技术上讲应该可行的， 不过只有一年的政治窗口期可以上马，