The -e flag to the echo command tells it to expand C-style escaped characters; in this case, it's going to turn \ t into a TAB character for you.

echo命令的- e标志用来告诉该命令扩展c风格的转义字符，在本示例中，它会把\ t转换为制表符。

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Any space characters should be escaped using the forward slash (\) character.

任何空格字符都应该避免使用向前的斜线(\)字符。

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The following characters need to be escaped with \ to be treated as part of a search query.

下面的字符需要使用\进行转义，以作为搜索查询的一部分。

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