另外，你要么不定义任何关联，要么在子pojo中定义一个值类型的属性来表示父pojo的ID(另一个方向也是类似的)。

Otherwise you either don't define any association or just define a value-typed property in the child POJO to represent the parent POJO's ID property (similar argument for the other direction).

youdao

关联没有指定评估的任何方向，它们可以在多个方向下执行，这在你处理双向问题时是很有用的。

The relations do not impose any direction of evaluation and can be executed in multiple directions, which can be useful when you're dealing with round-tripping issues.

youdao

根本就没有发现说谎与眼神方向之间的关联。

There was no correlation between lying and eye direction.

youdao