首先，将form对象实例化，然后设置它的动作和方法。

First, the form object is instantiated, and its action and method are set.

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Command对象封装了与动作的语义相关的名称和信息。

The Command object encapsulates the name and information related to the semantics of an action.

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客体：句子中充当动作所涉及的对象。

Object: a body involved in movements in a sentence.

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客体：句子中充当动作所涉及的对象。

Object: a body involved in movements in a sentence.

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