With the development of science and human civilization, many formerly unimaginable
things come into reality. Some of them have positive effects on our life, but some are
distasteful. The phenomenon of ___________ (主題現(xiàn)象) is an example of the former / latter
one.
There are many factors that may account for it, and the following are the most
conspicuous aspects. To start with, __________________ ( 原因1). Furthermore,
______________________ (原因2). Eventually, ________________________________ (原
因3).
Good as ____________ (主題現(xiàn)象) is, it has, unfortunately, its disadvantages. The
apparent example is that ______________ ( 缺點(diǎn)例子1). In addition,