impassioned: implies warmth and intensity without violence and suggests fluent verbal or artistic expression: an ~ plea for international understanding.


passionate: implies great vehemence and often violence and wasteful diffusion of emotion: ~ denunciations of American arrogance.     （diffuse使散布普及，这里形容宣泄，to spread something in all directions，如diffuse light漫射光，a diffuse community散居的社群）


ardent: implies an intense degree of zeal, devotion, or enthusiasm: an ~ admirer of the novels of Jane Austen. （zeal表示不懈的追求unflagging pursuit，devotion表示投入，都比enthusiasm热情程度深）


fervent: stresses sincerity and steadiness of emotional warmth or zeal: ~ Christians on a pilgrimage.


fervid: suggests warmly spontaneous and often feverishly urgent emotions: ~ love letters that suggest emotional imbalance. （spontaneous自发natural, lack of prompt，如a spontaneous burst of applause自发的热烈掌声）


perfervid: implies the expression of extravagated, insincere, or overwrought feelings: wary of such ~ expressions of selfless patriotism.      （overwrought做度激动excited in an uncontrolled way，如one overwrought member had to be restrained by friends一位会员过于激动，不得不去拦阻）  

impassioned充满感情: 形容感情温暖强烈，表达流利（但有节制without violence不剧烈），passionate激情: 情绪激烈到浪费的地步(用wasteful表示激烈到失控以至浪费)，ardent热情: 表示强烈的热情投入，fervent也是热情: 形容感情诚挚持久温暖，fervid热切:形容感情热烈而急切(fever发烧,urgent急切)，perfervid过度激情: 表达夸张虚伪过度。


记忆方法: 1）首字母ipaffp组合成AI 2FeiPao爱飞跑, 想象阿甘<==热情      


        2）热情的意思是强烈的感情mean showing intense feeling.