如题，
大的来说，正如ETS 自己的评分标准所说，ta 们是整体打分的。
小的来说，确实评分标准有很多维度构成
但，笼统来说，满分的文章一定是信息密度足够高的。
当然关于“信息密度”最好的解释，就是看一下几篇满分的文章。
给大家看两个最近的案例。
对应话题：
20160227 High school students are required to study many different subjects at the same time or they should study only three or four subjects at a time.
满分考生文章节选
To be sure, learning different subjects can have their its own benefits. First, students can own more knowledge by learning different subjects. By dedicating their time to various subject, they will gain an abundant amount of knowledge of each subject so therefore, they can learn a lot of skills. Second, they can explore what it’s like to be learn in different areas. By learning different subjects, they can be sure of what subjects they like and what subjects they dislike. This is very important since it determines what they want to do in the future. Take my brother’s friend Andrew as an example. He studied a lot of different subjects during high school such as history, English, music, math, Chinese, and so on. By learning in different areas, he gained knowledge from each class and he’s able to have a lot of knowledge in his mind. Whenever he goes somewhere, he can use these combined knowledges in order to understand what situation he’s in. Furthermore, by learning different subjects, he knows clearly that he loves history and science the most so he already knew that he’s going to pursue a major in either history or science after he graduates high school. Therefore, as you can see, learning different skills can have certain benefits.
简单来说，就是表达不是最高效的，但是展开比较多。
第二种满分的方式：
对应话题：
20150912 Do you agree or disagree with the statement: In order to succeed, it is better to be like others rather than different from everybody else.
满分考生文章节选
Admittedly, to be like others is easier and safer, because there are already people who have succeeded in this way and what we should do is to follow their steps. For example, if see a type of mobile phone is very popular, can produce the same kind of phones as well. Because we are sure that mobile phones like this are embraced by people, we can make a great amount of money in the same way. If we do some change to it, maybe the new phones are not welcomed by the public and what is waiting for us is failure. Hence, I concede that to be like others is safer and it promises us a bright future.
同样是一个段落，展开上比前一位少了很多，但是信息的密度是够的。
提高表达能力，来我们的线上写作满分班
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