It must be realized that.
我们必须意识到。I sincerely believe that.
我真诚地相信。Obviously, if we don't control the problem, the chances are that will lead us in danger.
很明显，如果我们不能控制这一问题，很有可能我们会陷入危险。Only in this way can we.
只有这样，我们才能The best way to solve the troubles is.
解决这些麻烦的最好办法是。Here are some suggestions for handling.
这是如何处理某事的一些建议People's views on vary from person to person. Some hold that . However, others believe that.
人们对的观点因人而异。有些人认为，然而其他人却认为As far as something is concerned.
就某事而言It is commonly believed that / It is a common belief that.
人们一般认为The Internet has been playing an increasingly important role in our day-to-day life. It has brought a lot of benefits but has created some serious problems as well.
互联网已在我们的生活中扮演着越来越重要的角色。它给我们带来了许多好处，但也产生了一些严重的问题But the problem is not so simple. Therefore 然而问题并非如此简单，所以……
As has been mentioned above...正如上面所提到的…
However, we have to look at the other side of the coin, that is... 然而我们还得看到事物的另一方面，即 …
From what has been discussed above, we may safely draw the conclusion that….通过以上讨论，我们可以得出结论…
I believe the title statement is valid because…. 我认为这个论点是正确的，因为…
I cannot entirely agree with the idea that ….我无法完全同意这一观点的… I believe….
