（英文）解釋和分析下這幾句話
1.The greatest outcome of the discovery of the reaction principle was that space travel became a reality.
2.The writer’s main purpose is to explain to Ph.D.students the logic which the scientific research paper follows
3.Research completed in 1982 found that in the United States soil erosion could be reduced by converting cultivated land to meadow or forest.
4.Many small-scale societies have survived and adapted in spite of predictions to the contrary
5.The reason for the simplicity of the Indian way of life is that Amazonia has always unable to support a more complex society
（1）麻煩先翻譯一下這些句子.
（2）可以告訴我你們是怎么看懂它們的么?我對這些句子的結構很不明確,不知道該怎么看.可以逐句分析一下么?
分析句子結構是最重要的！希望大家不要只顧得翻譯好不好。