Double-click on the maps to open up the input and output CARDS.

双击映射打开输入和输出卡。

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This leads to non-support for the double-byte character input/output used by the Japanese, Korean, and Chinese character sets.

这并不支持由日本，韩国，以及中国字符集使用的双字节字符的输入/输出。

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Though the double quotes implicitly types data as strings, the above method explicitly types both the input and output to the concat2 function as strings.

虽然双引号隐式地把数据类型定义为字符串，但是以上方法显式地把concat 2函数的输入和输出类型定义为字符串。

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