你需要自由的时间和金钱来观察鸟类。
她以为你需要新鲜空气，需要自由，需要到处跑。
She thought you needed fresh air and freedom and running about.
你必须汗流满面，才得以糊口。所以，获取知识、智慧和道德自由似乎需要极大的代价。
By the sweat of your brow, shall you get bread to eat. So knowledge or wisdom or perhaps moral freedom seems to come at a very high price.
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