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Originally, quinine was made from some tree bark. Quinine is used to cure malaria. Now, the cinchona tree is no longer the only source of quinine. It was the Spanish people who first used quinine as a medicine.
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To describe an experiment in which a Hydrapulper is used. To introduce Hydrapulper, a new type of garbage disposer. To tell what the writer thinks of the recycling of garbage. To explain why garbage should be recycled in a new way.
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