承上启下句型
Ⅰ承上阐述
330.To understand the truth(point/nature)of…，it is important (necessary/essential)to examine(analyze/see)…
331.To get a sense of(better look at/better understanding of/full appreciation of)how(what)…，we must(have to)turn first to(have a bird’s eye view of/make a close study of)…
332.To illustrate(prove/show)this point，let me(us)consider(ask why/look first at/develop my argument)
333.A(n)study(comparison/example)of…，perhaps，will make this point clear.
Ⅱ深入阐述
334.But that’s only part of the story(explanation).Perhaps the most significant(remarkable/surprising)about…is…
335.Another equally important role(aspect/function consideration)is…Equally important/essential is…
336.Closely connected with(related to/associated with/paralleling)this(factor)is…
337.…may further be supported by(demonstrate/contribute to)…
338.…is but one of many effects(functions/pressures/aspects/roles).Another is…/Another aspect/factor/characteristic is…(Another problem/question/difficulty arises).
339.Besides(In addition to this/Apart from…)，another(other)way(s)(think(s) /aspect(s)/function(s))is/are…
Ⅲ反面阐述
340.Despite(In spite of/For all)the difficulty(cost/problem/pressure/ increase)…
341.On the other hand，… On the contrary，… By contrast，… 342.Rather than… Instead of…
343.But(And)the opposite(reverse)is usually(also)true(the case)