But he also cautions: "At the same time, we must admit that the geographical range of people's activities in ancient times far exceeded what people today may imagine, and by various processes, cultural elements could be transmitted over very long distances."
但他也說，「我們同時也必須承認，古代人民的活動範圍每每勝過今人的想像，文化因素的傳播會通過若干環節，達到很遠的地方。」