domain 参数指示如果字符串不以.（句点）结尾，则解析功能将 附加到要查找的字符串的末尾。

The domain parameter instructs the resolving function to append to the end of the string to lookup if the string does not end with a . (period).

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为函数添加此附加功能的方法非常简单：提供名为nrows和ncols的两个输入参数，允许在调用函数时更改乘法表的大小。

This additional power was simple to include in the function: You provide input parameters named nrows and ncols that allow the size of The Times table to be changed when the function is invoked.

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调试模式提供类型检查和参数检查等附加错误处理功能，而且提供比发布模式更详细的错误消息。

Debug mode provides additional error-handling features, such as type checking and argument checking, and provides more detailed error messages than release mode does.

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