Safety then flows into the engineering design and calculations where levels of risk and "factors of safety" are calculated.

安全然后流入的工程设计和计算的风险水平下的“安全因素”进行计算。

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So it is significant on road safety design not only in theory but also in practise to measure the perception of safety given the complex interactions among various road factors.

因此，对不同道路条件下驾驶员的道路安全感觉进行定量描述与评价研究，将对道路安全设计与管理有着重要的理论与实践意义。

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As the main equipment, reasonable design and safety operation of containers have become key factors to the success of the transportation.

集装箱作为运输的主要载体，其合理设计和安全操作成为决定运输成败的关键因素。

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