68. 可降解的/可分解的材料 degradable / decomposable material

　　69. 代替 replace / substitute / take the place of

　　70. 注定要 be bound to

　　71. 反映了社會(huì)進(jìn)步的 mirror the social progress/advance

　　72. 增進(jìn)相互了解 enhance / promote mutual understanding

　　73. 充分利用 make full use of / take advantage of

　　74. 承受更大的工作壓力 suffer from heavier work pressure

　　75. 保障社會(huì)穩(wěn)定和繁榮 guarantee the stability and prosperity of our society

　　76. 更多地強(qiáng)調(diào) put more emphasis on…

　　77. 適應(yīng)社會(huì)發(fā)展 adapt oneself to the social development

　　78. 實(shí)現(xiàn)夢(mèng)想 realize one's dream

　　79. 主要理由列舉如下 The main / leading reasons are listed as follows:

　　80. 我們還有很長(zhǎng)的路要走 We still have a long way to go.

　　這些短語如果能恰當(dāng)?shù)剡\(yùn)用在作文中，將為你的作文增色不少，希望對(duì)大家有所幫助。