a princess of the blood的用法和样例：
- To the officials in the towns they passed through on their way, an Imperial Marriage Envoy escorting a Princess of the Blood was a personage only slightly less exalted than the Emperor.
- She was sick at the sight of the blood.
- First the surgeon performed the section of the blood vessel.
- Harvey discovered the circulation of the blood.
- She paled at the sight of the blood.