托福听力课外资料练习：科学美国人60秒噬铁菌相关内容分享

2017年07月24日14:12 来源：小站整理: 参与（0）阅读（2791）

摘要：托福听力的备考十分的重要，那么你应该如何练习呢?在备考过程中除了一些真题之外，一些常用的课外资料也是十分重要的。小编经常用到的就是科学美国人60秒，下面编在这里为为大家整理了科学美国人60秒：噬铁菌相关的内容分享，希望对大家有帮助。

在托福听力考试的备考过程中，科学美国人60秒相信大家一定用得比较多，那么大家平时是如何利用这个课外资料的呢?这里小编整理了科学美国人60秒：噬铁菌相关的内容分享，大家一起来学习一下吧。

科学美国人60秒听力练习：噬铁菌

科学美国人60秒英文文本

In the spring of 1912 an iceberg in the Atlantic took down the Titanic. Now, some humble bacteria are trying to finish the job. Scientists analyzing rust from the sunken ship have discovered a new species of microbe that eats iron. Their findings are described in the International Journal of Systematic and Evolutionary Microbiology. [Cristina Sánchez-Porro et al., "Halomonas titanicae sp. nov., a halophilic bacterium isolated from the RMS Titanic"]

Researchers have been studying the Titanic’s remains since they were discovered resting more than two miles beneath the ocean surface.

And they’ve found that the ship has been not-so-slowly disappearing. Visitors have removed artifacts, and the hull is festooned with rusticles: icicle-shaped accretions of iron oxide, otherwise known as rust.

Nearly 20 years ago scientists took samples of that rust, and found that it harbors a mix of iron-munching microbes. Now, analyzing the DNA of these organisms, researchers have catalogued more than two dozen strains of bacteria, including a new one they’ve dubbed Halomonas titanicae.

The bacteria are bad news for the Titanic, which may only last another 20 years, say the scientists. The good news is such bugs could be used to hasten the decay of other, less cinematic wrecks.