英语VOA慢速听力:龙卷风季节来临

更新时间:2023-07-19 15:04:51 阅读: 评论:0

英语VOA慢速听力:龙卷风季节来临
BARBARA KLEIN: This is SCIENCE IN THE NEWS in VOA Special English. I”m Barbara Klein.
BOB DOUGHTY: And I”m Bob Doughty. This week, we explore the science of tornadoes. The violent storms strike in many parts of the world but happen most commonly in the United States.
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(MUSIC)世博会会徽
BARBARA KLEIN: Tornado ason has begun in the United States.
新年快乐英文怎么写Last Tuesday a ries of storms tore across the Dallas-Fort Worth area in Texas. The tornadoes damaged or destroyed hundreds of homes. Yet no deaths were reported.
On March cond, more than forty tornadoes moved through the Ohio and Tenne Valleys, and the South. Reports say the storms killed at least thirty-nine people in five states.
A tornado is a violently turning tube of air suspended from a thick cloud. It extends from a thunderstorm in the sky down to the ground. The shape is like a funnel: wide at the top, narrower at the bottom.
A funnel cloud of a tornado that hit the midwestern state of Iowanice是什么中文意思
Tornadoes form when winds blowing in different directions meet in the clouds and begin to turn in circles. Warm air rising from below caus the wind tube to reach toward the ground. Becau of their circular movement, the windstorms are also known as twisters.
The most vere tornadoes can reach wind speeds of three hundred twenty kilometers an hour or more. In some cas, the resulting paths of damage can stretch more than a kilometer wide and eighty kilometers long.
BOB DOUGHTY: With a tornado, bigger does not necessarily mean stronger. Large tornadoes can be weak. And some of the smallest
tornadoes can be the most damaging. But no matter what the size, tornado winds are the strongest on Earth. Tornadoes have been known to carry trees, cars or homes from one place to another. They can also destroy anything in their path.
Tornadoes have been obrved on every continent except Antarctica. But experts say they are most commonly en in the United States. On average, more than one thousand are reported nationwide each year.
stallingThe National Oceanic and Atmospheric Administration keeps records of tornado sightings. It says tornadoes kill venty people and injure one thousand five hundred others nationwide in an average year.
(MUSIC)
凯莉日记电视剧BARBARA KLEIN: Tornadoes are obrved most often in the middle of the United States, where the land is mostly flat. The area where the most violent tornadoes usually happen is known as “Tornado Alley.“ This area is considered to extend from north central Texas to North Dakota.
Tornadoes can happen any time of the year. But most happen from late winter to the middle of summer. In some areas, there is a cond high ason in autumn.
BOB DOUGHTY: Tornado asons are the result of wind and weather patterns. During spring, warm air moves north and mixes with cold air remaining from winter. In autumn, the opposite happens. Cold weather moves south and combines with the last of the warm air from summer.moonglow
AP
A ries of tornadoes over two days in March killed forty people in Kentucky, Alabama, Indiana and
Ohio
马徐骏个人资料Tornadoes can strike with little or no warning. Most injuries happen when flying objects hit people. Experts say the best place to be is in an underground shelter, or a small, windowless room in the lowest part of a building.
therefore的用法People driving during a tornado are told to find low ground and lay flat, facedown, with their hands covering their head. People in the path of a tornado often just have minutes to make life-or-death decisions.
BARBARA KLEIN: The deadliest American tornado on record was the Tri-State Tornado of March eighteenth, nineteen twenty-five. It tore across Missouri, Illinois and Indiana. About ven hundred people were killed.
Between March and May of last year, there were one thousand one hundred fifty-nine confirmed tornadoes across the United States.
Scientists say that is the most on record for any three-month period. The most active month was last April, when ven hundred fifty-eight tornadoes were confirmed. That is the most ever for any month.
Last April, the country also broke a thirty-ven year old record for the largest tornado outbreak. A “tornado outbreak“ is often

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