塑料发明之后，工程师们在材料选择上有了更广阔的途径。
After plastic had been created, engineers were given a much wide choice of materials.
尽管缺乏建造材料，巧妙的中国工程师找到了解决办法。
Despite a lack of building materials, ingenious Chinese engineers found a solution.
填充材料不得储存在河堤没有明确许可的工程师。
Fill material shall not be stockpiled on embankments without the express permission of the Engineer.
在进行设计时工程师必须应用自己在工程学和材料学方面的知识。
In developing a design the engineer must apply his knowledge of engineering and material science.
在进行设计时工程师必须应用自己在工程学和材料学方面的知识。
In developing a design the engineer must apply his knowledge of engineering and material science.
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