行定界符总是换行符，不能自由选择。

The row delimiter is always the line break and cannot be chosen freely.

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必须选择不出现在数据本身中的列定界符。

A column delimiter has to be chosen that must not appear in the data itself.

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定界符：一个字符或者字符串，用来确定字符分割时候的分界。

A character or string used to indicate where a string should be split.

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定界符：一个字符或者字符串，用来确定字符分割时候的分界。

A character or string used to indicate where a string should be split.

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