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(单词翻译:双击或拖选)
September is usually the worst month for hurricanes in the Atlantic Ocean. At least ten named storms have formed there this year. The hurricane season continues until the end of November.
The total number of major storms this year has been above average. There were three major hurricanes in the Atlantic Ocean. The latest hurricane to strike land was called Hurricane Ike. It was a huge storm, stretching out across a thousand kilometers when it struck the southern coast of the United States last month.
Hurricane Ike caused major flooding and destroyed thousands of homes. It also left millions of people without power in Texas. The storm killed at least thirty people in nine states.
The situation was even worse in the nation of Haiti, which has been severely1 damaged by several storms this year.
VOICE TWO:
About ninety ocean storms form each year around the world. These powerful storms are called hurricanes when they form in the Atlantic Ocean and the eastern Pacific Ocean. They are called typhoons in the northwestern Pacific, and cyclones2 when they develop in the Indian Ocean. Severe ocean storms in the northern half of the world generally develop in late summer or early autumn near the equator3.
Storms can result when the air temperature in one area is different from that of another. Warmer air rises and cooler air falls. These movements create a difference in the pressure of the atmosphere. If the pressure changes over a large area, winds start to blow in a huge circle. High-pressure air is pulled toward4 a low-pressure center.
VOICE ONE:
Severe ocean storms happen less often in the southern hemisphere5. There, the season of greatest activity is between December and March. South of the equator, the winds flow in the same direction as the hands on a clock. North of the equator, they flow in the opposite direction.
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VOICE TWO:
Storms can get stronger as they move over warm ocean waters. The strongest, fastest winds of a hurricane are found in the eyewall. This is the area that surrounds the center, or eye, of the storm. The eye itself is calm by comparison6, with light winds and clear skies.
Wind speeds in severe ocean storms can reach more than two hundred fifty kilometers an hour. Up to fifty centimeters of rain can fall. Some storms have produced more than one hundred fifty centimeters of rain.
These storms also cause high waves and ocean surges8. A surge7 is a continuous9 movement of water that may reach six meters or more. The water strikes low coastal10 areas. Surges are commonly responsible for about ninety percent of all deaths from ocean storms.
VOICE ONE:
Scientists use computer programs to show where a storm might go. The programs combine information such as temperatures, wind speed, atmospheric11 pressure and the amount of water in the atmosphere.
Scientists collect the information with satellites, weather balloons and devices12 floating in the world's oceans. They also collect information from ships and passenger flights and from airplanes that fly in and around storms. The crews drop instruments on parachutes to record temperature, pressure, wind speed and other conditions.
VOICE TWO:
The Saffir-Simpson Hurricane Scale is a way to rate storms based on wind speed. It provides an idea of the amount of coastal flooding and property damage that might be expected.
The scale is divided into five groups. A category one storm has winds of about one hundred twenty to one hundred fifty kilometers an hour. It can damage trees and lightweight structures. It can also cause flooding.
Wind speeds in a category two hurricane can reach close to one hundred eighty kilometers an hour. These storms are often powerful enough to break windows or blow a protective13 covering off a house. Winds between about one hundred eighty and two hundred fifty kilometers an hour represent categories three and four. Anything even more powerful is a category five hurricane.
1 severely | |
adv.严格地;严厉地;非常恶劣地 | |
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2 cyclones | |
n.气旋( cyclone的名词复数 );旋风;飓风;暴风 | |
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3 equator | |
n.赤道,(平分球形物体的面的)圆 | |
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4 toward | |
prep.对于,关于,接近,将近,向,朝 | |
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5 hemisphere | |
n.半球,半球地图 | |
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6 comparison | |
n.比较,对照;比拟,比喻 | |
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7 surge | |
n.汹涌,澎湃;vi.汹涌,强烈感到,飞涨;vt.放开,松手 | |
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8 surges | |
n.奔涌向前( surge的名词复数 );(数量的)急剧上升;(感情等)洋溢;浪涛般汹涌奔腾v.(波涛等)汹涌( surge的第三人称单数 );(人群等)蜂拥而出;使强烈地感到 | |
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9 continuous | |
adj.继续的,连续的,持续的,延伸的 | |
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10 coastal | |
adj.海岸的,沿海的,沿岸的 | |
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11 atmospheric | |
adj.大气的,空气的;大气层的;大气所引起的 | |
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12 devices | |
n.设备;装置( device的名词复数 );花招;(为实现某种目的的)计划;手段 | |
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13 protective | |
adj.防护的,保护的 | |
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