Since this program can only display messages or run commands, it refuses to create an alarm that has neither a message nor a command.

因为此程序只能显示消息或运行命令，所以它拒绝创建既不是消息也不是命令的警报。

youdao

This program could naturally be extended to display an appropriate error message, which is explained next.

该程序可以被自然地扩展为显示适当的错误消息，我们在下一步将解释它。

youdao

Now, when a user enters 40 CC for the vehicle data, the program must display a message saying that the entry does not fall within the valid CC range. You can show the message simply as in Listing 1.

现在，当用户输入的车辆数据为40cc时，程序必须显示一条消息，说明输入的数据不在有效的CC范围内。

youdao

Do not, however, use a lot of colors or graphics embedded in your message, because not everyone USES ane-mail program that can display them.

但是，不要在邮件中用太多颜色或图片，因为不是每个人都能看到你的颜色和图片。

youdao

Do not, however, use a lot of colors or graphics embedded in your message, because not everyone USES ane-mail program that can display them.

但是，不要在邮件中用太多颜色或图片，因为不是每个人都能看到你的颜色和图片。

youdao