-- Structural: Meters = Seconds (same shape)
"The entire sequence of Artemis flights needs to represent a step-by-step build-up of capability, with each step bringing us closer to our ability to perform the landing missions. Each step needs to be big enough to make progress, but not so big that we take unnecessary risk given previous learnings."
，推荐阅读体育直播获取更多信息
Code dump for 2.16。业内人士推荐谷歌浏览器【最新下载地址】作为进阶阅读
nominal vs. structural types。关于这个话题，safew官方下载提供了深入分析