1.From above...
综上所述……
例句：From above, I think living in a big city is better.
综上所述，我认为居住在大城市是更好的。
2.Therefore, it is not difficult to draw the conclusion that...
因此，不难得出以下结论……
例句：Therefore, it is not difficult to draw the conclusion that living in a big city is better.
因此，不难得出居住在大城市更好的结论。
3.In a word, the whole society should pay close to the problem of... Only in this way can...in the future.
总之，全社会都应该密切关注……，只有这样将来才能……
例句：In a word, the whole society should pay close attention to the problem of protecting the environment. Only in this way can we have a good place to live in the future.
总之，全社会都应该密切关注环境保护问题，只有这样将来我们才能有一个生存的好地方。
4.To be sure, there may be difficulties we cannot overcome, but if we...
确实，有些困难我们无法克服，但如果我们能够……的话，……。
例句：To be sure, there may be difficulties we cannot overcome, but if we work hard, we can figure out another way to solve the problem.
确实，有些困难我们无法克服，但如果我们能够努力的话，我们就可以找到解决问题的另一种方法。