这一改变确实把模糊引入图中，但是这一模糊更多的是UML 2 规范中对抗错误的一个现实反射。
This change did introduce fuzziness into the picture, but this fuzziness is more of a reflection of reality versus a mistake in the UML 2 specification.
对抗条件反射作用：意在用肯定反应代替对某刺激产生的否定反应的条件反射作用。
Counterconditioning: conditioning intended to replace a negative response to a stimulus with a positive response.
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