我们必须利用科技进步的力量，保护各种不同的世界观，促进各种来源的知识和表达形式。

We must harness the power of progress to protect diverse visions of the world and to promote all sources of knowledge and forms of expression.

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观鸟者观察各种新的物种，从中他们不止能认识不同的鸟种，还能学到关于迁徙、鸟类行为学、食性、求爱还有鸟类领地的知识。

As birders observe new species, they not only learn about different birds, but they also learn about migration, bird behavior, feed preferences, courtship and bird territories.

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可以参考rss基础知识一节来回顾各种rss不同版本间的细微格式差别。

You may want to refer to the RSS basics section to recollect the subtle format differences among the different versions of RSS.

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