The thriving obsidian operation, for example, would necessitate more miners, additional manufacturers of obsidian tools, and additional traders to carry the goods to new markets. 例如,蓬勃发展的黑曜石业务将需要更多的矿工、更多的黑曜石工具制造商和更多的贸易商将货物运往新市场。
We have said the the real cause has to necessitate its effect. 我们说过真正的成因必须是结果的必要影响。