2.列举原因

　　1)One of the main reasons for this change is that the living standard of Chinese people has been improved greatly .
　　产生这个变化的一个主要原因是中国人的生活水平得到了很大的改善。

　　2)Among these resasons , the enrollment expansion of universities plays a very vital role .
　　在所有的原因中，大学扩招是很重要的因素。

　　3)First , the interest plays an important role in one student's choosing an elective class . / The interest is an important factor which influences / decides one student's choosing an elective class .
　　首先，兴趣在学生选择选修课时起到了至关重要的作用。/兴趣是影响/决定一个学生选择一门选修课的重要因素。

　　4)The weak supervision and management of traffic control sectors is ( also ) a noticeable reason .
　　交管部门的监管不力（也）是一个值得关注的原因。

　　5)Poor parents in rural areas cannot afford the high education for children , which becomes a main reason for their children's getting poor in the future .
　　在农村，贫穷的父母没有钱让他们的孩子接受高等教育，这是日后这些孩子变穷的主要原因。

　　6)More and more vehicles on road increase the chances of accidents .
　　汽车数量的增多增加了发生交通事故的几率。

　　7)The high social position of civil servants is an important factor drawing many people to choose it .
　　公务员有较高的社会地位，这是吸引人们选择它作为职业的一个重要因素。

　　8)More and more people become aware that those disasters have much to do with what we have done to the earth .
　　越来越多的人开始意识到，这些灾难的发生和我们人类对地球的所作所为有很大的关系。

　　9)Secondhand goods transactions make it possible for people to make good use of the goods which may be useless in their hands .
　　二手货交易使人们可以充分利用手里那些闲置的东西。

　　10)A part-time job can help release financial burdens on those poor students , and hence reduce the risk of their dropping school for lacking money .
　　兼职工作可以缓解贫困学生的经济负担，继而减少了他们因为缺钱而辍学的危险性。

　　11)This results in / leads to / produces a decreased chance for any individual graduate to find a job .
　　这使得大学毕业生找到工作的机会减少了。

　　12)Some teachers' classes could not attract students' interests so that some students sould rather skip classes to study what they are interested in .
　　一些教师的课不能引起学生的兴趣，以至于一些学生宁愿选择逃课去学习他们感兴趣的东西。

　　13)Nowadays college students get so much love that they are insensitive to others' care and help .
　　现在的大学生受到了太多的关注，他们已经对其他人的关心和帮助变得麻林不仁了。

　　14)Because of / Due to / Thanks to the poor internet administration and weak network security , our information might be open , stolen or sold .
　　由于网络管理的欠缺和网络安全的薄弱，我们的信息可能被公开、偷窃或出售。