開Nowadays with the rapid development of advanced .., more and more ...are commonly and widely used in everyday life. However, what worries most of us is that...

　　中 Firstly….Secondly…..Lastly but in no means least……

　　結(jié) To conclude, …..are just like a double-edged sword. With them we may have less trouble dealing with

　　problems in life and enjoy a better-off life. However, one point should be kept in mind that we should take sensible use of them , always being the master of them.

　　開頭段：It is accepted that …. Plays a significant part for both …, and what’s more , a lot of attention is being drawn to the change of….. However, whether … deserves such an attention , people’s ideas vary.

　　中間段：On the one hand, some people hold the view that …..

　　On the other hand, a great many people insist that….

　　結(jié)尾段：From my perspective, however…. (你的觀點(diǎn)) . Therefore, it’s time that (措施之類的)