block: v. 妨碍，阻碍
educational circle: 教育界
temporary: adj. 暂时的
depressing: adj. 令人沮丧的
take charge of: 负责
enlighten: v. 启蒙，教导
mission: n. 使命，任务
look down upon: 看不起
comprehend: v. 理解，领会
self-sustaining: adj. 自立的，自谋生活的
priceless: adj. 无价的，极其贵重的
reward: v. 酬劳，奖赏
Almost everybody who lives in the urban areas of China is familiar with the phenomenon shown in this picture.
This picture sharply points out two serious problems existing in…
It is a big contrast compared with…