As a user, you should be aware of the performance characteristics and optimization techniques for each approach.
作为用户，您应当了解每种方法的性能特征和优化技巧。
2
However, optimization decisions are a complex function of various attributes, including the database environment and query characteristics, as well as the data itself.
然而，优化决策是各种属性的复杂函数，这些属性包括数据库环境、查询特征以及数据本身。
3
The lifting mechanism after optimization features better characteristics curves of lift force factor and hydraulic pressure.