This particular bridge is of great historic importance, as it is the world's first bridge made of iron.

这张照片里的桥很有历史意义，因为它是世界上第一座完全用钢铁建造的桥梁。

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First, it's much easier for an application such as a search engine crawler to understand the relative importance of content, and second, a section is self-contained.

首先，应用程序(如搜索引擎crawler)能够更容易地了解内容的相对重要性，其次，节是自包含的。

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The first chapter is the preface, which brings out the questions discussed in this article later as well as the purpose, importance, methods and framework of the research and analysis in the article.

全文分为六部分：第一部分为前言部分，作者将提出本文所要论述的问题，并简述研究目的、研究意义、研究方法、研究旨趣以及分析架构。

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Tatiana Villegas highlighted the critical importance of in situ protection as the first option that should be implemented under protection programmes.

UNESCO: Underwater Cultural Heritage

His fellow party member Aled Roberts AM stressed the importance of first time buyers in the property chain as he said that there is "no point hoping people will climb the property ladder if the bottom rung is missing".

BBC: Liberal Democrats debate

The goals were the Spaniard's first since returning from injury and served as a timely reminder of his quality and importance to Everton's cause.

BBC: Mikel Arteta