In contrast, traditional engineering, for instance building construction, is constrained by well defined and well known physical laws.

相反，传统工程(比如建筑)则是被良好定义的和广为人知的物理法则约束着。

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But by the time you finish, you'll understand the physical laws that keep a building standing. You'll also know how to test materials, estimate costs, and evaluate mechanical and electrical systems.

完成学业后，学生就会明白让大楼屹立的物理定律，及如何测试材料，估计成本和测试机械和电气系统。

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For the building of teachers morality, perfecting educational legislation is the prerequisite, abiding by laws is the foundation, managing education with laws is the guarantee.

教育立法的完善是师德建设的前提；自觉守法是师德建设的基础；依法治教是师德建设的保障。

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Authorities also have promised to improve factory safety by modernizing equipment, overhauling fire-safety and building-safety laws, and increasing inspections.

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In the hubs of technology and commerce, like San Francisco and New York, growth is hampered by expensive rents, living expenses, and start-up costs, often stemming from restrictive building codes and outdated zoning laws.

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