expertise 英语解释:Skill or knowledge in a particular area. 汉语解释:专门知识：专门领域的知识或技巧. 例子: Significant advances in knowledge requie expertise from various field.重要的进步需要各个领域的专业知识.
professional knowledge 英 [prəˈfeʃənəl ˈnɔlidʒ] 美 [prəˈfɛʃənəl ˈnɑlɪdʒ]【词典】专业知识，专门知识例句：He will share his professional knowledge of haircare.他将和大家分享他在护发方面的专业知识。
