一个简单的英汉词典，输入英语可以查找，或删除，如果不存在，提示单词不存在，也可以添加，如果单词存在，提示单词已存在。-A simple English-Chinese dictionary, enter the English can find, or deleted, if it does not exist, suggesting that the word does not exist, you can also add, if the word exists, suggesting th