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. X randi10sz X 22 9 2 10 10 它是一种将前两行代码合并成一行的常见模式 X randi10sizeA.
3个是什么不知道 现在理论上还没有给出解释这里图片 不好编辑.
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Membranestructure Etfeproject Ptfeproject Spacesteelstructure What S New In The Standard For Design O Roof Structure Membrane Structure Building Structure