felicity condition meaning in English

合适条件
适宜性条件
妥适条件

Material , surface and structure design of heating tube imported enable water scale fall off automatically at felicity conditions which prolong service life of heater much
吉之美采用英国进口加热管，其材质选择及表面与结构设计可使加热管上的水垢在适当条件下自动脱落。
It investigates the realization patterns of “ advising ” in chinese on the basis of searle ’ s indirect speech act theory and his four felicity conditions . meanwhile , the study explores the politeness strategies utilized by chinese speakers in the institutional setting , the tv program , within the framework of brown and levinson . the study draws the following conclusions : firstly , all the speech acts of advising are performed indirectly
本文是完全基于汉语语料的一项实证研究,以塞尔的四个适切条件为分析标准,以间接言语行为理论为框架,分析并解释“建议”这一言语行为在汉语中的实现方式;同时,依据布朗和莱文森( 1987 )提出的礼貌策略,研究汉语使用者在实施“建议”时所使用的礼貌策略。