either ['aɪðə; 'iː-] adj. 两者之中任一的；两者之中每一的 prep. 任何一个 conj. 也（用于否定句或否定词组后）；根本 pron. 任一，两方

eg: There had been no indication of either breathlessness or any loss of mental faculties right until his death.
直到去世，他既没有出现呼吸困难也没有脑功能丧失的迹象。