潘基文呼吁“清洁能源革命”

短文：人口增长

Population GrowthThe growth of population during the past few centuries is no proof that population will continue to grow straight upward toward infinity and doom. On the contrary, demograph...

背诵美文——公共教育的角色变化

Changing Roles of Public EducationOne of the most important social developments that helped to make possible a shift in thinking about the role of public educatio...

政治：以色列国防部长遭到恐吓

政治：以色列国防部长遭到恐吓Security has been tightened around Israeli Defense Minister Ehud Barak after he received dozens of death threats. Security sources say the threats were made by Jewish ...