求助！！这些什么意思？？？

green1

麻烦大家帮忙解释下吧有些句子不太理解，1 you should use them to indicate what your evolution in thought was through time.So, just set up~~
2 it end up that I have data on more than just the immediate area.
3 what I am going to say 与 what I am going to be saying 区别？
4 did he happen to look at the people who sign?
5 Aactually I expect the population to be a lot lower today.
6 It typaically runs between 50 and 60 percent on the day the research paper is due.
7 have exams back
8 that bundles of fiber is much stronger than any of the individual fibers that composed it.