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.

WSJ: Another Fire as Bangladesh Toll Tops 900

"The efficiency of conventional heat engines is limited both by the laws of thermodynamics and practical concerns over the cost of building and operating complex engines, " says Los Alamos researcher Scott Backhaus.

CNN: Lab develops engine for the future