1 We may cite a common example of
2 A general /recent survey /investigation conducted by officials/scientists indicates /reveals/ suggests that
比较
1 Although the commonly-accepted belief/ idea is that XXX, a current/recent study/ survey indicates that
2 It is true that XXX, but it does not mean that
原因
1 The reasons/ causes for XXX are varied/ complicated and perhaps(probably) that they lie in the fact
2 Another contributing factor/ cause of XXX is that
开头
1 There is a general/ public debate/ discussion nowadays on/ over the XXX.Those who criticize/ object to XXX argue that
2 They believe that XXX, however, people who advocate/ favor XXX arguethat
结果
1 As it turns out / Indisputably/Accordingly
2 Considering all the factors above, we may safely draw the conclusionthat