Question

翻译 not so much....as

It is not so much the language as the cultural background that makes the book difficult to unde
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Answer 1

not so much A as B 与其说A不如说B。没有比较的意思，只是单纯的阐述观点。
His style of argument in the meeting is not so much aggressive as pertinactious.他在会议上的态度与其说是锋芒毕露，不如说是各执己见。
not as much A as B 与其说A，我更（偏爱）B。暗含有比较的意思。
这是我查的not so much ..as..的意思，所以我认为上句可翻译为: 与其说是语言令这本书难理解，不如说是书中的文化背景使其难理解。

Answer 2

not so much....as 与其说

t is not so much the language as the cultural background that makes the book difficult to understand.
与其说是这种语言的问题，不如说是它的文化背景使这本书难以理解.

Answer 3

not so much....as不如...那样
It is not so much the language as the cultural background that makes the book difficult to understand.
语言不如文化背景那样使书籍难以理解