电子词典，支持查询单词，打印帮助文档，学习单词，复习单词，猜数游戏，自定义计算器，删除单词，增添单词，记录生词到生词本，检测单词学习情况功能-Electronic dictionary support query word print help documentation to learn words, review your words, guessing game, custom calculator, delete a word, add a word to record new word