A second sector produces intermediate inputs using forgone consumption and the projects (knowledge) are developed in the third sector, which conducts research and development (R&D).
看了一篇文献，说第二部门生产中间投入品， 可是没有看懂使用知识和什么生产的中间投入品？请问各位大侠，这里的forgone consumption应该是什么意思呢？