To make a long story short, redundancy in systems design is a common technique to increase availability at the cost of additional hardware (and software).
简言之，在系统设计中冗余是提高可用性一个常用技术，代价是增加额外硬件(和软件)。
Virtual prototype technique was applied to study the safety of roller coaster for solving the defects in its traditional design, reducing its design cost, and improving its safety.
研究基于虚拟样机技术的过山车的安全性问题，旨在解决传统设计的弊端，有效降低设计成本，提高过山车的安全性能。
As a critical part of helicopter, rotor blade anti-fatigue design technique is one of the key to improving safety life and decreasing cost.
作为直升机的关键动部件，桨叶的抗疲劳设计技术是提高桨叶安全寿命，降低桨叶使用成本的关键。
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