What do you think the cause are for the robotic revolution? In the recent several decades, robotic technology has developed to a fairly high level and has formed a revolution all around the world. I think the prerequisite of the revolution is the development of science and technology. Based on the advanced science and technology, the robotic technology can take in skills and fruits of other subjects to enhance itself. Besides, the robotic revolution is also a result of the “laziness” of human beings. Modern people live under great pressure and have endless things to do. Thus, human beings create a variety of robots to do those things can be done by machine, loosing people from some kinds of manual work. Last but not least, In some fields of science, such as astronomy, nuclear experiments and submarine explorations, researches can be very dangerous and risky or even impossible to be finished by human beings. Because of this, the use of robots becomes critical and indispensible. Nowadays, many a benefit has been brought by the profound robotic revolution to human beings in many areas such as scientific researches, manufacturing and so forth. This promising industry will certainly bring us more surprises.

Social Networking Sites As long as social networking sites are mentioned, naturally, several kinds of sites flash into my mind. It's quite reasonable because nowadays we cannot live without these sites. They play a very important role in our everyday life. At the beginning, chatting tools like QQ and MSN have become a indispensable part for most people. They are used to chat with our friends, family and colleagues. Conveniently and immediately, people can get your messages. That is why these tools are so popular. Besides, Blogs like HJ blog and Micro blog can be count in a social networking sites. Different from QQ and MSN, the functions of them do not be limited into chatting tools, but an approach to release information ranging from latest news to self opinions, which is more integrated. At last, with social networking sites based on our circles of friends such as Facebook and Renren, we can keep connection with our friends easily and tightly however distant among us. To sum up, social networking sites have established another kind of social life---the cyber or online social life for us. By making full use of them, even the longest distance will be shortened in no time. PLease modify this piece of writing for me, thanks a lot!