61. The greater the population there is in one region, the greater the need there is for water, transportation and material.一个地方人口越多，其对水，交通和物资的需求就越大。
62. The difference between human and animal is that the former can think while the latter cannot, but both human and every breed of animals have their origin in ocean. 人类与动物的区别就在于前者会思考而后者不会，然而无论是人类还是任何动物的物种都起源于海洋。
63. The reason why the Beatles lives up to the reputation as the milestone in pop music lies in the fact that they are capable of adding their emotions and feelings for political affairs to their songs. 甲壳虫乐队不负盛名，是流行乐坛的里程碑，其原因在于他们能将自己对于政治事件的看法和情感融入他们的歌曲。
64. Once you figure out the characters of the compound sentences the teacher explained to us, you will have no difficulty doing your homework.一旦你弄清楚老师向我们解释的复合句的特点，做作业就不会有问题。
65. Long before children are able to speak or understand a language, they still manage to express themselves to their parents by making noises. 儿童在能说话或能听懂语言之前，通过发出噪声来向父母表达意见。
