但如何确定结构可靠度的限值却是一个尚待解决的重大决策问题。
However, how to determine the limits of structural reliability has still been an unsolved important decision problem.
分布式多层结构是应用系统开发不可避免的趋势，而计算机及其网络的安全问题又是一个极其重大的问题。
To develop the distributed multiplayer structure is a must for the application system and the security of computer and network is a big problem.
重点介绍国内重大件的水上运输工艺和几种码头结构型式，还对有关问题进行了探讨。
Water transportation technology of inland heavy cargo and several wharf structural types are mainly introduced. Studies are carried out to relevant problems.
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