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默认情况下,您似乎只能在关系形状的左侧和右侧显示基数。
有了这种行为,当我将实体放在关系的顶部和底部时,很难理解哪个是哪个。
您需要转到关系属性,将旋转设置为是。然后你可以指定左右基数,它会自动出现在顶部和底部。旋转关系可以解决问题。