在这种测试内，您给出的是一个代表某种数字符号的图像，用户必须读懂并在表单字段内输入这些符号。
In this test you present an image representing some alphanumeric characters that the user must read and type into a form field.
注意，这些值是数字值，而不是号码，因此用户必须说数字作为输入。
Note that these are digits, not Numbers, so when speaking a value the user must say the digits.
输入的数据必须是数字，而且不能是零(0)。
每个数字标识必须由密码保护。请输入新数字标识的密码。
Every Digital ID must be protected by a password. Enter a new password for your new Digital ID.
时钟等快速开关信号必须利用数字地屏蔽起来，以免向电路板上的其它器件辐射噪声，并且绝不应靠近基准输入。
Fast switching signals, such as clocks, must be shielded with digital ground to avoid radiating noise to other parts of the board, and must never be run near the reference inputs.
正如下面列出的，你必须用PHP代码确保月份和年份的输入是数字，并且只能是数字。
You need to add PHP code to ensure that the month and year inputs are digits and only digits, as shown below.
第一个问题是一个输入的模拟信号必须被重新表达为信号取样的序列，然后这些序列被转换成计算机的数字表达式。
The first problem was that an analog input signal had to be represented as a sequence of samples of the signal, which were then converted to the computer's numerical representation.
第一个问题是一个输入的模拟信号必须被重新表达为信号取样的序列，然后这些序列被转换成计算机的数字表达式。
The first problem was that an analog input signal had to be represented as a sequence of samples of the signal, which were then converted to the computer's numerical representation.
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