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

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.