The main difference is that, unlike the statement class, prepared statement is complied and optimized once and can be used multiple times by setting different parameter values.
预置语句与statement类的主要区别在于，前者可以只编译和优化一次，然后通过设置不同的参数值多次使用。
There are some deficiencies in the temple, like structural parameter of it needed being optimized, and the cost is relatively high in the trial-manufacturing moment.
新型边撑目前还存在一些不足，例如其结构参数还有待于优化；在试制阶段成本相对较高。
Introduced the optimized parameter of the multi screw and the design technique progress of thrust bearing system.
并对多螺杆的参数优化以及推力轴承系统的设计技术进展进行了介绍。
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