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问题: such....as

It's such a difficult problem as no one can work out.这是定语从句吗? 这里的such...as什么意思? thanks.

解答:

[1]定语从句

the same… as;such…as 中的as 是一种固定结构, "和……一样……"。
   I have got into the same trouble as he (has).




[2]结果状语从句.
"如此...与至于"



  so…that与such…that
  The boy is so young that he can't go to school.
  He is such a young boy that he can't go to school


请注意区别.