nothing in today‘s world is as big a problem as that of population. people begin to worry about the support capacity of the earth. and there might be only standing room for each person in the future. lima‘s population was 5. 7 million in 1985 but it grew to 9. 1 million in 2000. tianjin‘s was 7.9 million in 1985. in 2000, it boosted to 9. 7 million. such cities as london, osaka (共 1181 字) [阅读本文] >>