下面这句话中的“that”是引导什么从句吗？为什么不用语意更恰当的“so that”？

Question

The system has worked so well, that it has been adopted in other countries too.（由于这种制度行之有效，已被其他国家采纳。）——《新概念英语》

Answer 1

that引导的是结果状语从句，前面已经有so了，后面就不需要用so that了。将well后的逗号去掉，你就明白了。so well…that…。

Answer 2

so well that...前边已经有so了，就是so...that...结构，that引导的是就过状语从句。追答

结果状语从句，字打错了。

Answer 3

so well, that it has been adopted in other countries too.（由于这种制度行之有效，已被其他国家采纳。）——《新概念英语》

Answer 4

that - is referring to the system as conjunction in this case.

"conjunction"

introducing a subordinate clause expressing a statement or hypothesis.

"she said that she was satisfied

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