61. in the long run 从长远看来

　　62. make every citizen aware that 使每个人都意识到……

　　63. take the lead 起带头作用

　　64. deforestation 森林砍伐

　　65. ecosystem 生态系统

　　66. According to its definition, the purpose of sustainable development is to meet the needs of the present without compromising the ability of future generations to meet their own needs.根据定义，可持续发展战略提出的目的是在不损害子孙后代的利益的前提下满足今天人们的需要。

　　67. The fulfillment of one’s duty and obligations 履行某人的职责与义务

　　68. maintain the stability and unity of our country 维护我们国家的稳定和统一

　　69. Children’s love for their parents is the latter’s best reward. 孩子对父母的爱是对父母最好的回报。

　　70. vigor and vitality 生机与活力

　　71.an age of awakening 觉醒的时期

　　72. lay a good foundation for the future 为将来奠定坚实的基础

　　73. lack of awareness of time’s passage 不能意识到时光的流逝

　　74. go sightseeing 出去观光

　　75. remain fresh in one’s memory 让某人记忆犹新

　　76. It turned out that 结果表明…(接从句)

　　77. lengthen people’s life expectancy 延长人们的寿命

　　78. If science is properly used, it will benefit mankind, while if it is misused, it will lead to tragic result. 如果正当利用，科学将造福人类，如果利用不当，科学将引发灾难。

　　79. So it’s up to us to make science a blessing rather than a curse to mankind.让科学造福而非引发祸端，这是我们的责任。

　　80. propagate endangered animal species 促进濒危动物种群的繁衍。