任何项目范围的改动肯定会不可避免地带来相应预算的改变，无论是时间还是资源。
It is absolutely imperative that any change to the scope of the project have a matching change in budget, either time or resources.
这是有限制的，因为它需要对文档的有关声明是怎么产生的进行改动，这常常是不合需要的，而且如果文档格式不是RDF，则不可能发生改动。
This is limiting as it requires the alteration of a document about which the claim is being made — often undesirable, and if the document format isn't RDF, impossible.
就算您试着对集成方案做一个小小的改动，对未来导入与导出的影响仍然是不可预测的。
Even if it is tempting to make a minor change on the Integration schema, the impact on future exports and imports is unforeseeable.
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