Do you learn simplified character or traditional character?

你是学简体字还是繁体字？

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For example, the character that means man in the Lishu system from 200 BC is similar to the character that means man from the Jiantizi, or modern simplified system, of the twentieth century.

例如，公元前200年的隶书系统中的“人”字与20世纪的简体系统中的“人”字相似。

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You can think of tr as a (very) simplified variant of sed: it will replace one character with another or remove some characters altogether.

您可以将tr看作为sed的(极其)简化的变体：它可以用一个字符来替换另一个字符，或者可以完全除去一些字符。

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