In production environments, default mapping almost always do not suffice; some degree of tuning of the mapping is usually required.
在生产环境中，默认的映射几乎总是不够的；通常需要某种程度的映射调整。
If mapping work is to happen, it should only proceed to the degree of detail that meets the aspirations of the PM.
如果要进行映射工作，那么只应该着手于满足PM愿望的细节的程度。
Semantic measurement technology can well weigh the degree of similarity between two entities, and thus is of great benefit to establishing mapping.
语义度量技术可以很好的衡量两个实体的相似程度，对建立映射具有极大的帮助。
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