回答： A new technology suggests a fresh invention ,like Iphone 6, like the watch of new design for our everyday life ,which not only could see the time ,but also could survey our health ... the fresh inventions are usually costly, cool , and including the most advanced technology and the function .. they are the fashion...they make people have desire to buy one as they all like new things. and the things are more convenient. The most dramatic example of the convenience is the ipad produced by Apple , as it make us could deal with our work in the coffee shop ,and let us play the game in bed ,and it ,in sometimes ,replaces the computer in our life.

回答： The are more fashion. ......

回答： Make themselves look more cool and maybe let them have more arrogant .to show others that they are rich or fashion. of course ,there are some rational consumers .they need update their TV or cellphone .they want to own a more bigger cellphone or a more intelligent it. yes ,the factors will affect the time of choosing . The rational consumers have as much to do with the cost of product as quality ,rather than the time of placing. but the standpoint of others may be that the earlier time is key to buy it.

回答： the cost ,,the quality .... the function ....safe ...and the most important factor is whether you need it ..... For instance, our grandparents may be more dependent on the conventional cellphone which have the big words and simple function without many fashion things like wechat ,like games than the most fashion cellphone like iphone 6....their requirement is safe and lasting of the keeping running .

回答： irrational ... 当然不合适，如果一个人每月挣2000元，出去吃喝房租日常用品，几乎所剩无几，那还一有新机发布就去购买，花光钱不说，有的人甚至借钱也要买，就算买到了，在这种心理压力下得到的乐趣并不会太多。这就失去了买最新科技产品的意义了。