The first century Romans built much of the ancient Coliseum using concrete-like materials, and skilled stone artisans constructed the Roman Empire's famous network of roads.
一世纪罗马人建造的古代混凝土体育馆使用非常类似的材料，和熟练的工匠石头建成的罗马帝国著名的道路网络。
On the basis of piece-wise-linear plasticity and fracture mechanics, this article presented a 2-dimensional holonomic and nonholonomic constitutive model for cohesive crack of concrete-like materials.
基于分段线性塑性理论和断裂力学理论，提出了一种二维的全量形式和增量形式的粘性裂纹的本构模型。
At the moment, materials like concrete, steel and aluminium wouldn't even get close because they are too heavy and the force of gravity pressing on them would eventually make them collapse.
目前，像水泥、钢铁和铝这种材料根本不能达到要求，因为它们太重，而且他们受到的重力最终会让它垮塌。
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