3 这个句子中间的两个逗号内的短句是什么成分呢？插入语吗？还有后面的破折号呢？
the massification of the universities 和 the idea of life long learning 这两个逗号内的都是插入语吗？还是有别的什么作用？ institutions 为什么后面要加破折号呢？
最佳答案 2022-06-05 15:40
This doubt seems mainly to be due to the development of the new technology,massification of the universities, the idea of life-long learning ,the growing competition from other learning institutions -and (This doubt 省略) may be also because of the strong specification that we are now experiencing in most of fields of research.
解答：【1】the development of the new technology,【2】massification of the universities,【3】 the idea of life-long learning ,【4】the growing competition from other learning institutions 为4个并列名词短语作due to的宾语成分，and前面破折号其用来解释前面的原因作用。
句子主干为：“This doubt seems maily to be+due to 名词短语(1)+名词短语(2)+名词短语(3)+名词短语(4)-and this doubt may be also+名词+that 定语从句”
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