translation.en: However, after five decades of research, there's no strong consensus on the definition, the cause, the treatment, or even the existence of PMS.
translation.zh: 然而，经过50年的研究， 人们并没有在对经前综合征的 定义、起因、疗法 甚至它本身是否存在等方面 达成强有力的共识。