1·In the past the used refractory was treated as industrial wastes, which not only increased an enterprise 's economic burden, but also wasted utilizable resources, adding environmental load to society.
以往这些用后残存耐材都被作为工业废弃物处理，这不仅加重了企业的经济负担，而且更重要的是浪费了可利用的资源、增加了社会的环境负担。
2·Each hectare (2.47 acres) of corn planted in the United States will yield enough utilizable protein to feed 12 people 60 grams of protein per day for one year.
在美国，每公顷(2.47英亩)种植的玉米，一年可以生产出足够给12人每天吃60g的可利用蛋白质。