较大的羽毛可以逐渐增加升力，直到逐渐实现持续的飞行。
Larger feathers could have increased lift incrementally, until sustained flight was gradually achieved.
这并不意味着不会开发更大业务范围的数据仓库设计；随着初始数据仓库实现的扩展，将逐渐增加对它的构建。
This does not mean that a more business-wide data warehouse design will not be developed; it will be built incrementally as initial data warehouse implementations expand.
技巧是用一种保留渐增式实现模型的方式提供这些功能的实现。
The trick is to provide implementations of these features in a way that preserves the incremental implementation model.
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