An object that is not a sub-object of any other object is called a complete object.

不是任何其他对象的子对象的对象称为完整对象。

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If an object is actually a sub-object of another object-for example, an object that represents a given table of the database-it can simply be returned by a member function of its parent object.

如果一个对象确实是另外对象的子对象—比如，一个对象表示了个给定的数据库表—它能简单地通过成员函数返回它的父对象。

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An assertion can be a simple string or can be a complex object with many sub elements and attributes.

断言可以是一个简单的字符串或带多个子元素和属性的复杂对象。

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This broad metaphor also lent itself to sub-metaphors, including object-icons such as a rubbish bin (also the work of Mr Mercer when he worked at Apple in the 1980s), folders and files.

ECONOMIST: Metaphorically speaking