"Premium core is proprietary" means that the core technology or components of a specific product or service are privately owned and controlled by the company that developed it. This typically implies that the code or components of the core technology are protected by intellectual property laws and cannot be used or replicated by others without permission or authorization from the company. Essentially, it means that the company has exclusive rights over the core technology, allowing them to profit from its use and maintain control over its development and distribution.
解释一下Premium core is proprietary
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