在顺序图中，对象框没有名字“：”，这些对象叫做匿名对象。
On the Sequence diagram the object boxes have no name preceding the ":." These are called anonymous objects.
匿名-没有名字，通常已经发表的作品，或与任何已知的作者引用使用。
Anonymous - without name, usually used for a published work or quote with no known author.
因为这些函数都没有名字，所以都是匿名函数。
Since these function do not have a name, they are anonymous.
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