First, the you must modify the chapter1.xml file to remove the XML preprocessing directive and the DOCTYPE element.

首先，必须修改chapter 1 . xml文件以删除xml预处理指令和DOCTYPE元素。

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An important element of the EU's plan for a single market in financial services, the directive embraces both wholesale and retail trading in securities, including shares, bonds and derivatives.

作为欧盟单一金融服务市场计划的一个重要因素，这项指令囊括了包括股票，债券和衍生工具在内的证券的批发和零售交易。

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The directive sets the background to a highlight color when the user mouses over the DOM element to which it is applied.

当用户把鼠标移到DOM元素上时，指令将该元素的背景设置为一个高亮颜色。

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