Because of this glass arch, the amount of steel is kept to a minimum and the staircase can be seen as a transparent piece of furniture.

因为该玻璃拱架，钢的数量保持在最低水平，楼梯可以被看作是一个透明的家具。

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Bamboo bow of the Spring and Autumn Period: the arch was made of a single piece of bamboo, so it was called monomer bow.

文物：春秋竹弓，弓臂用单根竹材弯曲而成，称为单体弓。

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