• 物质的原因

material bin料仓materialn.材料；原料；素材；资料；题材；物质adj.物质的；重要的；关键的；肉体上的；实质性的material world or physical world物化世界material-medium security model物质保障模式material science and engineering材料科学与工程Material Action Reporting System物资器材行动报告系统material over- strength factor材料过强系数material evidence identification物证鉴定material constraint relationship物料约束关系Material Acquisition and Delivery器材采购与交付material circumstances of a crime犯罪具体情节material and energy flow analysis物质与能量流分析

1. This is the root cause of poverty.
   这是贫穷的根本原因。
2. We cannot assign a cause to these events.
   我们无法说明发生这些事件的原因。