unproductive capital

例句：

1. 1. The company's investment in new technology was unproductive, as the results were not significant.
   公司对新技术的投资是无效的，因为结果并不显著。
2. 2.The research project was unproductive because it did not yield any meaningful findings.
   这个研究项目是无效的，因为它没有得出任何有意义的发现。
3. 3.The farmer decided to switch to organic farming practices, hoping they would be more productive and profitable.
   这位农民决定转向有机农业实践，希望它们会更有生产力和盈利。