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(2012北京中考)Dr.Jack Todd is very interested in clean water .____,so it's natural that he is to developer of a small and affordable system(系统)to clean wastewater,His “Living Machine" can clean wastewater in your home or in your business.
__61__ The wastewater goes into a big plastic tank where bacteria(细菌)start to break down the waste.A few days later after it is dealt with, the water is brought into a greenhouse filled with plants and fish.With the help of sunlight,the plants and animals remove more chemicals from the water,making it cleaner,Then the water can be reused for washing or bathing __62__ but the water is clean enough for watering the flowing, washing the dog, or even for bathing or swimming.
The advantage of this technology is that it is affordable and good for the environment. __63__. It can help to use less fresh water, and it can help keep the water supply unpolluted.
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