请问在这个同位语句子中先行词是reson是先行词为什么省略了that？

Question

同位语句子中很多都是没有that的，是不是不能作为先行词就可以省略that啊？句子：Silicon Valley is a hatcher of hostility for the same reason it is a wellspring of innovation：it is a small world populated by people who want to prove how clever they are.

Answer 1

the same reason that是同位语从句。That做限定词。the same reason 是先行词，That限定词所以省略。追问

不是说同位语从句that不能省略吗

追答

引导同位语从句的 that 被省略的情况

不过, 引导同位语从句的t hat 被省去的情况也是有的, 尤其是在名

词feeling, idea, hope 和成语on condit ion, on t he understanding 等后面。