impassive: stresses the absence of any external sign of emotion in action or facial expression: just sat there with an ~ look.


stoic: implies an apparent indifference to pleasure or especially to pains, often as a matter of principle or self-discipline: remained resolutely ~ even in the face of adversity.


phlegmatic: implies a temperament or constitution hard to arouse: a ~ person immune to amorous advances.   （constitution体质表示人体的组成makeup of the body, 由身体和智力共同决定determined by both physical and mental states，如a robust, healthy constitution强壮健康的体质）


apathetic: may imply a puzzling or deplorable indifference or inertness: charitable appeals met an  ~ response.   （deplore既让人悲哀又让人谴责what arouses both sorrow and condemnation，如he's a judo black belt but he says he deplores violence他是一名柔道黑带选手，但他说自己对暴力感到悲哀谴责）  


stolid: implies a habitual absence of interest, responsiveness, or curiosity about anything beyond an accustomed routine: a ~ woman, wedded to routine.


impassive无感情无表情: 强调举止或表情没表现出任何情感，stoic坚忍: 指不以苦乐为意，常表示践行原则或自身修炼，phlegmatic冷淡: 指难以激动的性格体质，apathetic冷漠: 让人不能理解、悲叹谴责的无动于衷懒惰，stolid没兴趣没反应: 对习惯范围以外的事物缺乏兴趣反应好奇


记忆方法: 1) 首字母ISPAS排列成I PASS我不要<==无感觉

              2) 无感的意思是(对常人感到有趣让人激动的事)没有反应mean unresponsive to something that might normally excite interest or emotion.首字母ISPAS排列成I PASS我不要<==无感觉