在应用程序层次结构中，对话适合于放在什么地方？

Where do conversations fit into an application hierarchy?

youdao

了解应用程序在各个层次上的性能以及如何处理每类事务或存在延迟的地方，这是至关重要的一个方面。

Understanding how the application is performing on each tier and for each class of transaction or where latency exists in the code is crucial.

youdao

缺点是每次在类层次结构的任何地方添加一个新属性时都必须将一个新属性添加到表中。

The disadvantages are that every time a new attribute is added anywhere in the class hierarchy a new attribute must be added to the table.

youdao