by right

例句：

1. He inherited his father by right of his primogeniture.
   他憑著長子繼承權，繼承了他父親的財產。
2. The Normans ruled England by right of conquest.
   諾曼人征服了英格蘭成了統治者。
3. By rights, half the reward should be mine.
   按理說，有一半獎賞應該是我的。