如果该标识符用作主键，又有变更，我们只好在RentalLocation对象里改变逻辑。
If this identifier is used as a primary key, and then changes, we will have to change the logic in our RentalLocation object.
如果该标识符用作主键，又有变更，我们只好在RentalLocation对象里改变逻辑。
If this identifier is used as a primary key, and then changes, we will have to change the logic in our RentalLocation object.
应用推荐