Sufferers experience a triad of symptoms: headache, fever, and sore throat.患者有三个症状：头疼、发烧和嗓子疼。The river flows through a triad of mouths into the sea.这条河经三个河口流入大海。For the faculty, there exists the triad of responsibilities: teaching, research, and service.教员要承担三重责任:教学、研究与服务。