Some arrays have two dimensions, such as the number of offices on each floor of each building on a campus.
某些阵列会具有两个维度，例如校园中每栋建筑物之每个楼层的办公室数目。
The specification of an element requires both the building number and the floor, and each element holds the count for that combination of building and floor.
元素规格需要有建筑物编号和楼层，而每个元素则会保留该建筑物和楼层组合的计数。
The specification of an element requires both the building number and the floor, and each element holds the count for that combination of building and floor.
元素规格需要有建筑物编号和楼层，而每个元素则会保留该建筑物和楼层组合的计数。
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