If you don't know that it has a bug that affects only a few programs, you may build a program and put it in production without knowing that you'll see occasional catastrophic failures.
如果您不知道它现在有一个只会影响少部分程序的bug，您可能会编译一个程序并将其发布为产品，而没有意识到这样您将会遇到偶然的灾难性错误。
Without knowing unique attributes of the changed users, it is impossible to construct SQL query statement that retrieve only the changed data from the users table.
在不知道已改变用户的唯一属性的情况下，构造一个SQL声明去users表中重新获取已经改变的数据是可能的。
The only thing it cannot do is call the put method, and this is because it cannot verify the safety of such an operation without knowing the type parameter t for this Box instance.
它惟一不能做的事是调用put方法，这是因为在不知道该Box实例的类型参数t的情况下它不能检验这个操作的安全性。
It enables you to execute commands without knowing the actual command syntax, making it particularly handy if you only use wsadmin commands on occasion.
它使用户不需知道实际的命令语法，就能够执行命令。这尤其方便了偶尔使用wsadmin命令的用户。
Note: I think that you should add captcha only if you are sure that you will have a spam problem, or you already have this issue, not from the start without knowing if you really need it.
注：我认为你应该只有在你确定你会有一个垃圾邮件的问题添加验证码，或者你已经有这个问题，并不是从一开始就不知道你是否真的需要它。
Note: I think that you should add captcha only if you are sure that you will have a spam problem, or you already have this issue, not from the start without knowing if you really need it.
注：我认为你应该只有在你确定你会有一个垃圾邮件的问题添加验证码，或者你已经有这个问题，并不是从一开始就不知道你是否真的需要它。
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