详细解释:a. 大写字母的
vt. 用大写字母写, 以大写字母印刷
词型变化：
动词过去式:uppercased过去分词:uppercased现在分词:uppercasing第三人称单数:uppercases英语解释：
名词 uppercase:
one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis同义词：capital, capital letter, upper-case letter, majuscule