Simultaneously, a loop circuit is formed by a lead line being connected with an outer connecting power and a warningunit and the warning is achieved.
同时，通过导线接通外接电源，报警器，形成一个回路，实现报警。
2
Rather than deleting the root user unit, another option is to mark the root user account unit as publicly editable, which would change the error to a warning.
除了删除根用户单元，另外一个选项就是将根用户账户单元标记为公共可编辑状态，这将会将错误转化为警告。
3
If the MySQLVersion attribute has no value, a warning message appears on the unit as shown in Figure 8.