simple insertion character

例句：

1. 1. This program uses a simple insertion character to identify the user's password.
   这个程序使用一个简单的插入字符来识别用户的密码。
2. 2. The simple insertion character is used to prevent SQL injection attacks.
   简单的插入字符被用来防止SQL注入攻击。
3. 3.The developer needs to ensure that the simple insertion character is properly escaped before being inserted into the database.
   开发人员需要确保在将简单的插入字符插入数据库之前对其进行正确转义。