If the program does not indicate this, a user will interpret it as rudeness at best; at worst, he will assume the program has crashed and that drastic action must be taken.

• 如果程序没有表明这些，好一点的话，用户可能只会认为它粗鲁；不好的话，会认为程序已经崩溃，必须采取激烈的措施。