前言 #1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzABCDEFGHI，共计字数=字母总数+数字数字符集长度（此处为英文字符）即(n_letters + n m) = (m, where: l is the length of a string in characters and 'a' to ‘z’ are considered as single character. For simplicity we assume all letters used here have equal weight.)，这里我们以“**‘智启新篇·共创辉煌——论比特区的未来发展及国际交流平台的重要性”作为标题为例进行展开描述。” ###### （注：“...共计字数为示例计算方式说明”）