abbr. failure fraction automatically switched 自动切换故障比率（模式）; Fellow of the Faculty of Architects and Surveyors 建筑师测量员系学员; Full Face Air Supplied (respirator) 面部呼吸机
单词分析
单词结构：
ffas
字母数：4
记忆提示
🎯 重点记忆：
单词拼写：ffas
核心含义：abbr. failure fraction automatically switched 自动切换故障比率（模式）; Fellow of the Faculty of Architects and Surveyors 建筑师测量员系学员; Full Face Air Supplied (respirator) 面部呼吸机