美国科学60秒 SSS 2015-04-15
时间：2019-01-20 作者：英语课 分类：2015年Scientific American(四)月
Early warning systems can be the difference between life and death in earthquake-prone regions. But they are expensive. The US, Mexico and Japan have such systems. That leaves large swats of central and South America, Asia and the Caribbean unprotected. Now scientists think one solution could be hiding in our pockets, our cell phones. Smart phones employ the latest GPS technology. So scientists tested arrays of smart phones to determine if they could measure the displacement 1 caused by the earth shaking and signal the subtle beginnings of an earthquake. For the experiment, the researchers used a hypothetical Magnitude 7 earthquake in California and data from the real Magnitude 9 earthquake off the coast of Japan in 2011 that led to the tsunami 2 that caused the nuclear accident at Fukushima. They found that as few as 500 cell phones in California could alert the public 5 seconds before an event, enough time to at least move to a less vulnerable part of a room or dive under a desk. For the Japanese earthquake, early warning would not have helped in the region closest to the epicenter, but such an alert could have helped cut damage in downtown Tokyo, and the information would have reached the coastline life-saving minutes before the resulting tsunami waves did. The researchers in the Journal Science advance this. The scientists say various technological 3 details need to be worked out, such as how companies would allow smart phones to access and share the raw data. They point out that instead of waiting to buy expensive top-grade scientific equipment, governments could consider creating interim 4 early detection systems based on arrays of sensitive smart phones.
- They said that time is the feeling of spatial displacement.他们说时间是空间位移的感觉。
- The displacement of all my energy into caring for the baby.我所有精力都放在了照顾宝宝上。
- Powerful quake sparks tsunami warning in Japan.大地震触发了日本的海啸预警。
- Coastlines all around the Indian Ocean inundated by a huge tsunami.大海啸把印度洋沿岸地区都淹没了。
- A successful company must keep up with the pace of technological change.一家成功的公司必须得跟上技术变革的步伐。
- Today,the pace of life is increasing with technological advancements.当今， 随着科技进步，生活节奏不断增快。