第二段中，“People might choose their clothes for certain conditions and some purposes” 这句似乎和后文矛盾。既然是为了特殊环境和目的，又这么证明是人们内心的反应，比如校服，工作服，不都是为了conditions and some purposes嘛。而且后面教授和学生的例子都是说明他们内心对如何dress不care。建议这句可以换个说法。
The author contends that what people look, dress and act can show their interests and attitudes, and we can realize the society's ideas and values through the appearance and behavior of its people. In my view, I generally agree with the author's assertions, although we should not only judge one person from his outside appearance.（这个让步的问题）
To begin with, the way individuals look and dress could reveal their attitudes and interests to certain extend. People might choose their clothes for certain conditions and some purposes, and then we could get what their tastes are from their appearances.（和后文好像矛盾） For example, the professors and students in colleges, the most people surrounding us, may like simple and comfortable dresses, because they prefer to spend their time on the study and they do not like the dresses to net them. Another example is that the people who are always following the fashions should be more curious and active than others. In brief, by observing what people's dresses and actions, we may realize something about what they think or like.
Next, the common behaviors of people might reveal the society's values and attitudes. For instance, in ancient China, especially during the Tang Dynasty, the fat people were always seen as beauties. The reason why people loved to become fat is that in the ancient times the low amount of harvest was a big problem, and sometimes common people may not be able to feed themselves enough so that they dreamed to become fat like the rich ones. And now we can still estimate the development level of one country from its people’s common appearance. In sum, what people think and act in common could tell the value system of a society to certain extend.（例子是否和论述相对应）
Moreover, what the people dress and act can show the society's political attitudes. Several months ago, the New York Philharmonic Orchestra went to North Korea to play a historic concert, and the western reporters sent back a lot of pictures of the North Korean. It is shocked to see that the people in the streets there are all wear under gray and black（不通哇～）, extremely dull and colorless. It seems that the people in North Korea are under heavily power control of the government, and they only own little free space and human rights.（论点似乎和第一段重了）
However, we should not judge a person just from his outside appearance. What things appear does not always exactly tell us the truth. Some rich people and famous stars may want to dress simply to hide themselves in crown. On the other hand, many criminals use their appearances to cheat people. Therefore, we should not judge persons only by observing their appearances.（这段让步的必要性和合理性）
All in all, although we should not judge people only from his outside, what he look, act, and dress could reveal his attitudes and interests to certain extend, and the common appearance and behavior can tell us some about the society's ideas and values.