Nevertheless, no alternative intellectual model – or source of inspiration – has emerged to offer a truly coherent alternative.
然而，迄今还没有其他哪种知识模型（或灵感源泉）可以成为真正条理清楚的替代选择。
If that source provides no matches, the facade invokes the alternate information sources in a predefined order until matches are found or until it exhausts all the alternative sources.
如果这个源不提供任何匹配的结果，那么facade将按照预定义的顺序调用其他备用的信息源，直到找到匹配的结果、或者直到它查找完所有可供选择的信息源。
If that source provides no matches, the facade invokes the alternate information sources in a predefined order until matches are found or until it exhausts all the alternative sources.
如果这个源不提供任何匹配的结果，那么facade将按照预定义的顺序调用其他备用的信息源，直到找到匹配的结果、或者直到它查找完所有可供选择的信息源。
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