Despite a lack of building materials, ingenious Chinese engineers found a solution.
尽管缺乏建造材料，巧妙的中国工程师找到了解决办法。
After plastic had been created, engineers were given a much wide choice of materials.
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.
塑料发明之后，工程师们在材料选择上有了更广阔的途径。
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