事实上，通过移民实现自我完善的愿望是人类经历的一个关键要素 — — 任凭沙漠、海洋抑或人为的屏障都无法阻隔。
In fact, the desire for self-improvement through migration is a key element of the human story – one that no desert, sea, or artificial barrier has been able to quell.