In a unidirectional association, two classes are related, but only one class knows that the relationship exists.
在一个单向关联中，两个类是相关的，但是只有一个类知道这种联系的存在。
Our ElectricityDeal has a unidirectional one-to-many association with DealCharge as shown in the following HBM file excerpt.
我们的ElectricityDeal与DealCharge有单向one - to - many关联，如下列hbm文件片段所示。
Our ElectricityDeal has a unidirectional one-to-many association with DealCharge as shown in the following HBM file excerpt.
我们的ElectricityDeal与DealCharge有单向one - to - many关联，如下列hbm文件片段所示。
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