The type of variable you create determines which attributes of the object are changeable.

该类型的变量创建确定哪些属性的对象是多变的。

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Then define a new attribute of Topic called category with type TopicCategory as changeable with bounds 0-1.

然后，为Topic定义一个新属性，叫做category，类型为Topic category, changeable，范围0 - 1。

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Nowadays how enterprises to be organizations of the studying type attracts more and more attention in the changeable social environment.

企业如何成为学习型组织是当今多变的社会经营环境中人们关注的主要问题。

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