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- Title: Lecture I: Nutrition and Health
- your entire body. If you go down into the earth where there are coal
- deposits, you've got black coal. When you sharpen a pencil, you've got
- graphite. Coal and graphite: they're both carbon. Your whole body is
- human body. You could say, a man is just a heap of black coal! But you
- substance. If someday the coal that is dug out of the earth can by
- diamonds hidden in our body. Or we are a coal field! But now when