请帮忙划分英语句子结构 3、In addition to having to be a g

题目

请帮忙划分英语句子结构 3、In addition to having to be a g
3、In addition to having to be a generalist while specializing in what may seem to be a narrow field,the researcher is faced with the problem of primary materials that have little or no documentation.
4、The primary reason was skepticism that a railroad built through so challenging and thinly settled a stretch of desert,mountain,and semiarid plain could pay a profit.

答案

3、In addition to having to be a generalist while specializing in what may seem to be a narrow field,很长的介词短语.需要细分一下,having to be又是动名词短语,最In addition to里介词to的介词宾语.然后,又由...