[法]?直系继承人
... son and heir长子, 嫡子 heir of line直系继承人 heir apparentph.1. 【律】法定继承人;有确定继承权的人 ...
At twenty-three, he was the youngest of the group but heir to a long line of champions from his island a fact that he attributed to the springwater.
NEWYORKER: The Strongest Man in the World
The constitution was even modified to ensure the continuity of the Grimaldi line, in the event that Albert never produced an heir.
NPR: Monaco's Princess Caroline Becomes A Grandmother
"Since I wasn't in line as the heir I felt that I could throw off the shackles of my family name quite easily, " recalls Gautam.
FORBES: Magazine Article
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。