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1、Unit 4Natural DisastersPeriod Project & Video Time话题词汇1harmony n.和谐2lack n. 缺乏3source n. 来源；起源，根源4habitat n. 栖息地5threaten v. 威胁6severe adj. 严峻的7atmosphere n. 大气；气氛8challenging adj. 具有挑战性的9decrease/decline v. 减少，变小10disappearance n. 消失11terrify v. 恐吓；使恐怖12extinction n. 灭绝13preserve v. 保护；保持，保存14punis
2、hment n. 惩罚15responsibility n. 责任，职责16donateto 向捐赠17economic losses 经济损失18come to ones rescue 前来救某人19take on a new look 呈现新面貌20earthquake relief 抗震救灾话题句型1Id appreciate it (It couldnt be better) if you could take my tips into account/consideration and I do hope that your newspaper will make a differe
3、nce to environmental protection 如果你们考虑我的建议我将感激不尽，我非常希望你们的报 纸对环境保护有意义。2Nowadays, with the development of economy，many cities are faced with serious environmental problems，which does great harm to peoples health. 现在，随着经济的发展，许多城市面临着严重的环境问题， 这对人们的健康十分有害。3Its high/about time that we paid much attention t
4、o protecting our environment. 到了我们应该高度重视保护我们的环境的时候了。4I believe if everyone does his bit to protect the wetlands, the wetlands are sure to be well preserved and we can enjoy a more harmonious environment 我相信如果每个人都致力于保护湿地，那么湿地就能得到很 好的保护，我们能够享受更加和谐的环境。5Faced with this severe situation，we are supposed t
5、o raise the awareness of environmental protection. 面对这种恶劣的情况，我们应该提高环境保护的意识。话题时文Compared with other causes of natural disasters, volcanoes offer clues only when they are about to erupt. Now, however, developments in monitoring systems have allowed scientists to develop sensors(感应器) to detect and fore
6、cast eruptions more accurately.University of Cambridge volcanologist Marie Edmonds says that scientists are now able to use very accurate sensors to monitor the gases volcanoes give out, which can give clues on the location of the magma(岩浆). The sensors help with predictionbecause different gases ar
7、e released at different stages of an eruption. When magma rises, pressure is released along with gases. Carbon dioxide(CO2) is released early on and then, as the magma goes higher, sulphur dioxide(SO2) is released. The ratio of the two gases is used to detect the location of magma to the surface, te
8、lling researchers the coming of the eruption.Edmonds is connected to an international group known as the Deep Carbon Observatory that has worked to put new gas sensors on fifteen of the most active and dangerous volcanoes to improve the forecasting of various types of eruptions. The gas sensorsconti
9、nually measure water vapor, sulphur dioxide, and carbon dioxide. They are placed inside large boxes with the surface antennae and buried underground. Advances in electronics have increased their accuracy and lowered their cost, allowing more of them to be used worldwide.Putting these sensors atop ac
10、tive volcanoes is dangerous. Scientists wear reflective suits that protect against heat, plus gas masks for protection from dangerous gases. They sometimes hike long distances in remote areas to reach a site. However, according to Edmonds, the work they do to save peoples lives makes a dangerous job
11、 worth it. She enjoys doing something that helps people.Edmonds team has also attached sensors to a certain plane to measure gases released from a Papua New Guinea volcano for a short time, a technique developed to gather “snapshots” of the activity. These snapshots help researchers to better understand activities that lead to eruptions.
