向下兼容性将在9版本中移除。

Backward compatibility will be removed in version 9.

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向下兼容性是指一个高级系统与一个较低级系统相互配介的能力。

Downward compatibility means the capability of an advanced system to interact with a lesser advanced one.

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提供对之前发行版中组件、模板、触发器及其它扩展的向下兼容性。

Deliver backwards compatibility with previous releases of components, templates, modules and other extensions.

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