富兰克林的造诣就是发现之前的DNA的X光照片很难解读，因为DNA有两种结晶体——A型和B型——取决于含水量。

Franklin's achievement was to discover that previous X-ray photos of DNA were hard to interpret because DNA crystallizes in two forms, known as a and b, depending on their water content.

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利用旧地图、印刷品和照片，但主要还是自己的眼睛和头脑，如此你将有机会用课程中学到的知识去“解读”所选择的研究地点。

Using old maps, prints, and photographs, but primarily your own eyes and mind, you will have the opportunity to apply the knowledge gained in the course to "reading" a site of your choosing.

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请注意，(人们)可能会脱离上下文解读图片，因此必须全力避免上传难堪的，自我暴露性的，负面消极的个人照片。

Note that images can easily be taken out of context online as well: Posting embarrassing, revealing or negative photos of yourself should be avoided at all costs.

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