任何允许外部实体来输入数据的程序都容易受到恶意的攻击，例如缓冲区溢出和嵌入式控制字符。
Any program that allows an external entity to input data is vulnerable to malicious activity, such as buffer overflows and embedded control characters.
如果此人拥有多台车辆，应用程序必须允许输入多台车辆的数据。
If she owns more than one vehicle, the application must allow her to enter data of more than one vehicle.
验证允许应用程序确保用户正确地输入数据。
Validation allows the application to make sure the user enters data correctly.
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