信件里的一段文章在周三由自然杂志刊发，内容侧重于与1953dna双螺旋结构的发现有相关的模型。

An article on the letters was published Wednesday in the journal Nature, focusing on those related to the discovery of DNA's double helix structure in 1953.

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先前发现与B12最高水平相关的基因变异可以保护胃免受诺沃克病毒的感染，和幽门螺旋杆菌引起的溃疡。

The gene variant associated with the highest B12 levels has previously been determined to protect the stomach from infection by the Norwalk virus and ulcer-causing H. pylori bacterium.

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芝加哥消息——即使对于可疑脑梗死这样的适应症，医生也应该注意到检查过程中多排螺旋CT相关的辐射剂量问题。

CHICAGO - Even for indications as serious as suspected stroke, doctors should be aware of the radiation doses being delivered with the multiple ct exams typically delivered during the course of care.

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Remember I talk those of you who were here the first time: this course is built like a spiral Everything is intra-connected, what I talked about in the first class is connected to what I'm going to talk about today, is going to be connected to lecture 19.

记得一开始我就跟你们说过：,这课程就像个螺旋,内部的一切都是相关的，第一节课讲到的内容,与今天要谈的课题有关，也和第19课有关。

哈佛公开课 - 幸福课课程节选