He is a seventh- degree judo black belt. Besides, he belongs to a notorious underworld gang.
他是一位柔道七段的高手，而且他属于一个恶名著的黑社会帮派。
Any of12 levels of proficiency at the grade of black belt in martial arts such as judo and karate.
段在东方武术中，黑腰带的级别精通达12级中的任一级，如柔道和空手道
