土壤退化也不再是一个问题，可以使用水栽法栽种粮食作物——换句话说，就是使用一种含有矿物质的溶解液。
Soil erosion will not be a problem because the food will be grown hydroponically-in other words, in a solution of minerals dissolved in water.
它由神经连接的退化和死亡引起，神经连接可以产生多巴胺，而多巴胺是协调动作的细胞间联系必需的物质。
It is caused by degeneration and death of nerve connections that produce dopamine, a substance necessary for communication between cells that coordinate movement.
从整体上说，物质世界只能是进化和退化的辩证统一。
The material world, on the whole, can only be seen as unity of evolution and degeneration.
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