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Day9 2021.01.26
阅读时间:8min分析时间:16min
【自然科学-气候】
Using satellites to spot industry's methane leaks :to help combat climate change
Structure:
Mainidea:卫星可以帮助公司发现甲烷泄露,用来对抗气候变暖
Sentences:
1.the reason for consern is that although methane,the main constituent of natural gas,does not linger in the atmosphere for anywhere near as long as carbon dioxide does,it is a far more potent heat-trapping agent
2.on the top of that,for firms seeking to burnish their green credentials,plugging leaks isone of the most effective things they can do to help combat chnage
Words:
plume:羽状物
potent:有效的,强有力的
plug:插头,塞子
阅读时间:8min分析时间:30min
【自然科学-地质】
Radiocarbon dating by accelerator mass spectrometry
structure:
mainidea:新的弹同位素测的方法:加速器质谱
P1:传统的方法可以测定过去30000年的物体,但是在超过20000年准确性会降低
P2:碳14易受周围碳元素影响造成误差,并且有两个缺点1样本太少不行2不能去除周围环境碳元素影响
P3:加速器质谱没有上面的问题
P4:新技术帮助科学家研究北美的人类起源迁徙以及语言
P5:新技术可以用于研究尼安德特人的消失
Sentences:
1.accelerator mass spectrometry can push the threshold further back in time,however.
2.unfortunately,stringent specimen handing and treatment procedures ultimately result in relatively small sample sizes,which conventional radioncarbon dating is poorly equipped to handle
3.an accurate time scale for the colonization of america is crucial in order to assess how quickly the first paleo-india hunters and gatherers dispersed,settled and developed their ethnic and linguistic diversity
Words:
map out:在地图上标出,筹划
skew:偏的,歪斜的,偏态的
stringent:严格的
insurmountable:不能克服的,不能超越的
ambient:周围的
collagen:胶原,胶原质
uthoritative:无条件转移的
chronology:年表,年代学 |
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