Some people see a squatter city in Nigeria or India and the desperation overwhelms them: rickety shelters, little kids working or begging, filthy water and air.

• 有人参观尼日利亚或者印度某个寮屋城区后就绝望得不知所措：摇摇晃晃的棚屋、干活或乞讨着的小孩、肮脏的水和空气。