他们商定，孩子们与父方母方分别各住两个星期。
They had an arrangement that the children would spend two weeks with each parent.
向导包含了文件名与父类文件信息。
联合表：(可选)将子类映射到与父类映射到的表具有外键关系的表。
Joined table: (Optional) the child class is mapped to a table that has a foreign key relationship to the table to which the parent is mapped.
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