input digit

例句：

1. 1. The program requires users to input their names and email addresses.
   该程序要求用户输入姓名和电子邮件地址。
2. 2. The computer system can input commands by pressing a button.
   计算机系统可以通过按下一个按钮来输入命令。
3. 3. The user must input the correct password before they can access the file.
   用户必须在能够访问文件之前输入正确的密码。