Use uppercase letters for each word and separate each pair of words with an underscore when naming constants.
Use uppercase letters for each word and separate each pair of words with an underscore when naming constants.
当命名常量时，每个单词均大写，单词之间以下划线区分。
Use uppercase letters for each word and separate each pair of words with an underscore when naming constants.
当命名常量时，每个单词均大写，单词之间以下划线区分。