So they kept track of country-by-country, when cases of smallpox occurred, and as it was eliminated from regions of the country, they then certified those regions to be smallpox free.

它跟踪调查了一个又一个国家,记录天花在这个国家中何时发生,又是何时清除的,并确证这个区域已经没有天花

耶鲁公开课 - 生物医学工程探索课程节选

And so that debris fills up a little spot that would feel, according to reports, because again we don't see it now, feels like a little pellet underneath your skin.

然后这些死亡细胞都填充在一个点上,会有一种,根据记录所说,因为我们,没有再见过这病,会感觉皮肤下面有个小球

耶鲁公开课 - 生物医学工程探索课程节选

This was one of the very first recorded bugs in the history of computation.

在关于计算的历史上,有一个最早记录的bug，如果你们。

麻省理工公开课 - 计算机科学及编程导论课程节选