在平面形状优化基础上，在机翼容积不变约束下，再采用剖面翼型优化设计，通过机翼剖面细微变化弱化较大马赫数下的激波、减小激波阻力。
In the second design step, improvement of wing's aerodynamic characteristic is mainly depended on the weakening of shock which reduces wave drag during the wing section optimization.
一致性：事务保持数据上定义的所有不变的属性(如完整性约束)。
Consistency: a transaction preserves all the invariant properties (such as integrity constraints) defined on the data.
而它们中的一些保持恒定不变，因变量按某种自然的方式变化，从而维持约束条件。
Some of them are held fixed, and then some dependent variable does whatever it must so that the constraint keeps holding.
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