(单词翻译:单击)
听力文本
Scientists have discovered what they believe to be the cleanest air on Earth. Researchers from Colorado State University and the Australian Bureau of Meteorology conducted research on the purity of the air above Antarctica. They found a region over the Southern Ocean, between the south of Australia and Antarctica, that was "unaffected" by human activity. The scientists said the area they researched formed the atmosphere in the lower clouds. The analysis of the air showed that it was totally free from "anthropogenic aerosols". These are pollutants or particles derived from human activity, or dust from other continents. The scientists called this pollution-free area, "truly pristine".
The scientists analysed the structure of airborne microbes in the lower clouds over the Southern Ocean. They looked at the DNA of the microbes and tracked where they came from. Their analysis included monitoring wind trajectories to detect how far the microbes may have travelled. They found that the atmospheric eco-system was very much "isolated," self-contained, and free from contaminants from elsewhere in the world. The source of the microbes was the Southern Ocean, rather than airborne pollutants from other continents. The researchers concluded that the Southern Ocean is one of very few places on Earth that has been "minimally affected by anthropogenic activities".
译文由可可原创,仅供学习交流使用,未经许可请勿转载 。
重点解析
1.These are pollutants or particles derived from human activity, or dust from other continents.
derive from 源自
A scholar derives knowledge from reading.
学者读书获得知识 。
2.Their analysis included monitoring wind trajectories to detect how far the microbes may have travelled.
trajectory 轨迹
None of it has changed the trajectory.
没有任何东西改变我们的轨迹 。
参考翻译
科学家发现了他们认为是地球上最干净的空气
科学家们分析了南大洋上空较低云层中空气微生物的结构