the degree to which a disease or poison is dangerous or harmful and quick to have an effect 致命的；恶性的；剧毒的 the virulence of the virus strain 病毒株的毒力
- (formal)
the fact of showing strong negative and bitter feelings 狠毒的；恶毒的；不共戴天的 the virulence of the attacks on her in the press 新闻界对她的攻击的毒力