Variables begin with a percent symbol (%) and stand in for information that can't be known when the configuration file was written.

在编写配置文件时，变量都以百分比符号(%)开始，表示未知的信息。

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They use the percent (%) symbol instead of the ampersand, and can be either named entities or external entities.

它们使用百分号（%）而不是与字符，可以是命名实体或外部实体。

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The poll revealed over three quarters of British drivers were unable to identify the motorway map symbol, while only one percent of motorists would pass the Cub Scout Map Reader test.

该调查发现，英国超过四分之三的司机不会辨认公路地图图标，仅有1%的司机能通过“幼童军认图测试”。

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The poll revealed over three quarters of British drivers were unable to identify the motorway map symbol, while only one percent of motorists would pass the Cub Scout Map Reader test.

该调查发现，英国超过四分之三的司机不会辨认公路地图图标，仅有1%的司机能通过“幼童军认图测试”。

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