Colorized, painted, hologram, and jeweled Coins can, even with proper handling, before or after grading and encapsulation, lose some or all of these additive features.

即使经适当处理，在评级或封装前后，该等上色，着色，添加全息防伪，以及镶嵌宝石的钱币上的添加物的特性也有可能全部或部分丧失。

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Further work can be done on the framework to enhance the implementation with proper exception handling and caching services.

可以开展进一步工作，使用适当的异常处理和缓存服务加强实现。

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The portlet implementation needs to make sure that there is proper backend access and cache update handling if the cache does not return the data when queried with a certain key.

Portlet实现需要确保如果使用特定键查询时，缓存没有返回数据，应有适当的后端访问和缓存进行更新处理。

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