17.当前，在。。。当中有一种普遍观点，认为，。。。 There is a popular belief among … that …

　　18.曾经一度，人们普遍认为，。。。 For some time in the past it has been widely accepted that… People used to believe that …

　　19.正如有些人所经常指出的那样，。。。。。。。。。。。。 As is often pointed out by some people, ….

　　20.有些人理所当然的认为，。。。 Some people take it for granted that … …

　　21.有些人坚持认为。。。。。，因为。。。。。。 Some people argue that it is absolutely necessary to … because …

　　22.但是，另外一些人则认为。。。他们之所以这样认为，在一定程度上是因为。。。On the other hand, some others still maintain that … To some extent their opinion derives from the fact that …

　　23.在我看来，。。。利大于弊。 In my opinion, … do more good than harm

　　24.不容否认 。。。 No one can deny that … / It’s an undeniable fact that …

　　25.不言而喻，。。。 It goes without saying that …

　　26.现有证据表明，。。。 All available evidence piles up to show / points to / adds up to the fact that …

　　27.就 。。。而言，。。。 As far as … is concerned, … 就 。。。而言，。。。

　　28.更严重的是。。。。。。 What is more serious is that …

　　29.俗话说，“。。。” A proverb says …

　　30.俗话说得好，“。。。” As the old Chinese saying goes, …

　　31.就我所知，。。。 As far as I know,

　　32.毫无疑问，。。。 There is no doubt that … / It is no doubt that …

　　33.对。。。来说，。。。是非常重要的。 It is essential / necessary / important for sb. to do sth.

　　34.任何事物都是一把双刃剑 Every sword has two blades. Every coin has two sides