They pick out small, interesting episodes and use them to represent the bigger picture, like the part in which they decide to stay up all night talking after being bothered by beetles at a site where Genghis Khan encamped. It's just a vignette, but they use it to depict how the environment has changed and what a threat non-native species represent to the Mongolian steppe.
例如在成吉思汗營地被無名黑甲蟲困擾而乾脆徹夜聊天的小故事，雖只是旅行中的小插曲，但已點出了環境變遷，外來物種入侵蒙古草原的危機。