区域大小落差：一个对象的区域大小和该对象的子对象的区域大小之间的差别。

Drop in reach size: the difference between the reach size of an object and the reach size of a child of that object.

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所有其他元素对象都包含在它或者它的一个子对象中。

All other element objects are included in it or in one of its children.

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将自动序列化此根对象的所有子对象。

The object or root of the object graph to serialize.

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将自动序列化此根对象的所有子对象。

The object or root of the object graph to serialize.

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