主体部分说理
第一句： Firstly, obvious is a sight that
替换句型：1. first of all , it is indisputable fact that
2. first of all , it is an undeniable fact that
3. it is an irrefutable fact that
4. it is vitally important that
5. one point which I believe to be absolutely pivotal is the fact that
6. it is vital that
第二句： This is because
第三句： for example
替换句型： This is particularly so given the fact that
第三段：
第一句： In addition to this
替换句型：1. Equally importantly ,
2. further and even more importantly ,
3. even more disturbing , is
4. secondly and more importantly , though , in order to , it is essential that
5.
第二句：for example ,
替换句型： 1. one particularly good example of this is
2. one particularly salient example of this is
第三句：
第四段：
第一句：It is also true that
替换句型：1. However , perhaps the strongest argument in favor of is that
2. Yet , perhaps the strongest argument in favor of is that
第二句：if
第三句：however ,
替换句型：however , this is unlikely to occur while