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。
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.
尽管钢笔很小，但它改变了历史，促进了国家间的贸易，记录事件，传播新闻，比其他所有工具为人类做的工作都多。
Though it is small, the pen has changed the history, improved the trade of countries, recorded events, carried news, and done far more work for human beings than all other tools.
本周，联邦贸易委员会就准备发布一份关于个人隐私的报告，呼吁设计一款阻止浏览器追踪的工具软件。
This week, the Federal Trade Commission is expected to release a privacy report calling for a "do-not-track" tool for Web browsers.
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