只能通过两种方式初始化结构成员：一是使用参数化构造函数，二是在声明结构后分别访问成员。

You can initialize struct members only by using a parameterized constructor or by accessing the members individually after the struct is declared.

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ActionCatalog包含配方构造步骤函数的一个参数化的RecipeJAUS命令序列。

The ActionCatalog contains a parametrized RecipeJAUS command sequence for recipe construct step functions.

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这些界限可以指定一组可用的构造函数，它们必须出现在参数的每一个实例化中。

These bounds could specify the set of available constructors that must be present in any instantiation of the parameter.

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