如果两个集合相等,则断言失败。
如果两个集合中的元素相同,而且这些元素的顺序和数量均相同,则这两个集合相等。
Two collections are equal if they have the same elements in the same order and quantity.
如果两个对象的给定数据成员集合的值相同,它们就相等。
Two objects are equal if they have the same value for a given set of their data members.
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