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63. Participating in interactive experiences beneficial to all is something that no one should miss . The valuable lessons learned therefrom should not be arbitrarily dismissed , but should instead be treasured . 参加对所有人都有益的互动式体验是任何一个人都不应该错过的。从中获得的宝贵经验不应该任意抛弃，而应该倍加珍惜。 64. Abortion advocates may be correct in their assertion that the practice is a necessary tool of population control , but they seem to neglect the preciousness of human life in its earliest stages . 人工流产的提倡者认为它是控制人口的一种必要手段。他们也许是对的，但他们可能忽略了人的生命在最初阶段的宝贵。 65. Some people assert that nothing is impossible . Such people should get a grip on reality and understand its impossible to create another Universe . In more down-to-earth terms , its impossible to know with any certainty whether you will live or die tomorrow . 一些人断言没有什么事是不可能的。这些人应该把握现实，知道再造一个宇宙是不可能的。更现实的说法是不可能明确知道明天你会活着还是会死。 66. Two major factors contributed to devastating summer flooding along the Yangtze River and its tributaries . First , erosion resulting from excessive deforestation in the upper reaches of the river and , second ,heavy silting which raised the riverbed in the main channel . | 
