You said that a good brain should be flexible in doing things, talking and doing things. The biggest difference between college students and junior college students is the difference in learning ability, which means that college students are generally superior to junior college students in learning ability, and there is no difference in other aspects. To a great extent, college students are more adaptable to the society, more resistant to stress and more flexible in handling affairs, because college students generally receive more training in this respect than freshmen.