它们是否都有删除对象以及添加对象的机制？
Do they all have mechanisms for removing objects as well as adding them?
日记通常包含在案例上执行的所有动作，以及添加或更新的所有内容。
This typically includes any actions taken on the case, along with any content that is added or updated.
生成的代码相当简单，修改其行为以及添加检验功能和额外的处理也很容易。
The generated code is relatively simple and modifying its behavior, as well as adding validations and extra processing, is easily understood.
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