translation.en: So the new molecular entities with priority rating are the revolutionary new drugs, whereas the slight variations of existing drugs -- Viagra, different color, different dosage -- are the less revolutionary ones.
translation.zh: 有优先评级的新分子实体药物 是革新型药物。 而对原有药物进行细微改进的— — 比如伟哥，改变药物颜色、 改变药物剂量 — — 这就属于非革新型药物了。