该错误通常发生在为命令输入了不正确的开关或单字符开关组合时。
This error generally occurs when a incorrect switch or combination of single character switches has been entered for a command.
如果没有 -CA 开关，Perl就会认为输入数据是字符 199。
幸运的是，Expect提供了各种有价值的调试开关，以报告其交互过程；这正是我确定CCNA01所生成的各种字符的方法。
Luckily, Expect has helpful debugging switches to report on its interactions; that's how I determined exactly what characters CCNA01 was emitting.
该方案将被叠加的字符或图像数据保存在FPGA内部的ROM中，由内部逻辑控制电路产生点阵时序，控制视频通道切换开关，完成叠加功能。
The data of overlapped characters and pictures are stored in the ROM of FPGA, The Times are generated by FPGA inner logic circuit to control the switch of TV channels to finish the overlapping work.
在命令行的后面追加一个采用字符串参数数组的开关，但不尝试在开关参数的两侧加上引号。
Appends the command line with a switch that takes an array of string parameters, without attempting to encapsulate switch parameters with quotation marks.
在命令行的后面追加一个采用单个字符串参数的开关，但不尝试在开关参数的两侧加上引号。
Appends the command line with a switch that takes a single string parameter, without attempting to encapsulate the switch parameter with quotation marks.
在命令行的后面追加一个开关，该开关采用充当字符串参数的任务项规范数组。
Appends the command line with a switch that takes a task item specification that ACTS a single string parameter.
在命令行的后面追加一个开关，该开关采用充当单个字符串参数的任务项规范。
Appends the command line with a switch that takes an array of task item specifications that act as string parameters.
在命令行的后面追加一个采用充当单个字符串参数的任务项规范的开关，但不尝试在开关参数的两侧加上引号。
Appends the command line with a switch that takes an array of task item specifications that act as string parameters, without attempting to encapsulate them with quotation marks.
在命令行的后面追加一个采用充当字符串参数的任务项规范数组的开关，但不尝试在任务项规范的两侧加上引号。
Appends the command line with a switch that takes a task item specification as a single string parameter, without attempting to encapsulate the switch parameter with quotation marks.
在命令行的后面追加一个采用单个字符串参数的开关。
Appends the command line with a switch that takes an array of string parameters.
在命令行的后面追加一个采用字符串参数数组的开关。
Appends the command line with a switch that takes a single string parameter.
在命令行的后面追加一个采用字符串参数数组的开关。
Appends the command line with a switch that takes a single string parameter.
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