通过假设得出了一系列的可怕的后果，最后再得出结论，这样的结论是发人深省，当然也是最能引起人们广泛重视的。

五、换种说法，换而言之。

The computer technology has no doubt at all replaced most of function, that is, we can read books from the academic database; newspapers and publishes from almost everywhere, this means that we do not need many hard copies and environment friendly for the earth. However I am not so much convinced that public libraries can replace other functions that we need other than providing information or books.

换而言之就是换种方式去解释，使解释更加具体直观话，因而更能被理解并接受。

以上就是我对展开雅思大作文主体段的一些个人见解，希望对大家有所帮助！