Why is the site of the Buddha's first sermon looked upon as more important than other sermon sites?
佛初次说法的地方为什么要比其他说法的地方看得重要呢？

The Buddha's initial turning of the wheel of Dhamma at Sārnāth was a great event in Buddhism. At that time, Buddhism was established; and after that, the Three Gems (Tiratana) came into existence.
佛在鹿野苑初转法轮这件事是佛教的一件大事。从那时起，开始建立了佛教；从那时起，开始具足了三宝。