因为运输成本的下降，一些重要领域，比如肉类加工业和钢铁业才逐渐变得产业高度集中化。
Key industries, including meatpacking and steel, became highly concentrated in response to the reduced cost of transportation.
Web3D站点上列出的主要领域有CAD、医疗图像和可视化仿真，但是还提到了制图、交互、技术训练和制作文档。
The Web3D site lists CAD, medical imaging, and visual simulations as the main focus, but also mentions cartography, education, technical training, and documentation.
研究剖明，回想夸姣年光能奋发情感，属意和糊口生涯生存它们是使糊口秩序化的最令人对劲的要领之一。
Studies show that thinking back on happy times elevates mood, and observing and preserving memories is one of the most satisfying ways of bringing order to life.
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