Likewise, closer to home, as many as half of our discoveries of new medicines have originated from accidents. For example, isoniazid was initially tested as a tuberculosis drug; iproniazid, one of its derivatives, later proved to be effective in the treatment of depression.
类似地，在与我们距离更近的医疗领域，多大一半的新药最都是源于偶然。比如，异烟肼最初是作为结核病药物接受测试的；而其衍生药物异烟酰异丙肼后来证明在治疗抑郁症方面很有效果。