The current "high-tech" agricultural production system is a major source of environmental degradation in the United States. 当前高度技术化的农业生产体系是美国环境变劣的一个主要根源。
The company sets up a pilot project to see if the proposed manufacturing system is efficient. 公司提出一个小规模实验方案以观设想的生产体系是否有效。
