Susan is the daughter of the famous environmental scientist Clark. But the woman has become an environmentalist 66 her own. In 1992,the first UN Earth Summit(峰会) was held in Rio de Janeiro. Thousands of people fr...
8. expect of/from... 从...当中期待 9. in return 作为回报 10. the survey on ... 关于... 的调查 11. differ in... 在...方面不同 12. emerge from... 从...出现 13. be satisfied with... 对...满意 14....