这样削弱了为展开形式中除最后一个命令以外的其他任何命令指定附加参数的能力。

This breaks the ability to specify additional arguments to any command but the last in the expansion.

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如果一个变量包含空格，双引号会按原样把变量展开为一个参数。

If a variable contains whitespace, the double quotation marks keep the variable expansion intact as a single argument.

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查询参数用来启用或禁用与查询相关的功能，比如拼写纠正、同义词展开等等。

The query parameters are used to enable or disable query related functions such as the spell corrector, the synonyms expansion, and so on.

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