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。