Civil engineers build mathematical models of Bridges and other structures to calculate how much weight and stress they can bear before committing to an expensive construction phase.
土木工程师建造桥梁和其他结构的数学模型,从而在进入昂贵的实际建设阶段之前计算出所设计的结构能够承受多大的重量和压力。
Temporary construction sites, temporary sites for the interim period and the same period must themselves bear the expense of the users.
临时用地上临时建筑的期限与临时用地的期限相同,期满必须自行拆除,费用由使用者承担。
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