Use named objects to perform and print each computation.
使用已命名对象执行运算并输出每次计算。
Our example lifeline in Figure 3 is a named object, but not all lifelines represent named objects.
图 3 中我们生命线例子是一个命名的对象,但是不是所有的生命线都代表命名的对象。
Permissions with lists are most useful for protecting resources that contain a large number of named objects.
带有列表的权限对保护包含大量命名对象的资源最有用。
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