The legal analyst must put some of the ideational material of policy and principle into the law .

法律分析者谅必要将思考政策和原理的某些材料置于法律之中。

To sum up , newspaper headlines play a vital role in representing the world ( ideational function ) through transitivity system and voice , constructing social identities and establishing social relations ( interpersonal function ) through mood and modality , and achieving texture ( textual function ) through thematization and information structure .

报纸新闻标题通过其及物系统实现构筑社会现实、传播意识形态的概念功能，通过语气-情态系统和语态实现构建社会身份和社会关系的人际功能，并通过主位和信息结构来组建联贯语篇。