高洁

The only difference between a hurricane and a typhoon is the1 where the storm occurs.

Hurricanes and typhoons are the same weather phenomenon： tropical 1）cyclones.A tropical cyclone is a generic term used by meteorologists to describea rotating， organized system of clouds and thunderstorms that 2）originates overtropical or subtropical waters and has closed，2circulation.

The weakest tropical cyclones are called tropical depressions. If a depressionintensifies such that its maximum sustained winds reach 39 mile3，the tropical cyclone becomes a tropical storm. Once a tropical cyclonereaches maximum sustained winds of 74 miles per hour or higher， it is thenclassified as a hurricane， typhoon， or tropical cyclone， depending upon4the storm originates in the world. In the North Atlantic， central NorthPacific， and eastern North Pacific， the term hurricane is used. The same typeof disturbance in the Northwest Pacific is called a typhoon.5， in theSouth Pacific and Indian Ocean， the generic term tropical cyclone is used， regardlessof the strength of the wind associated with the weather system.

The ingredients for tropical cyclones6a pre-existing weatherdisturbance， warm tropical oceans， moisture， and relatively light winds.If the right conditions 3）persist long enough， they can combine to producethe violent winds，7 ， torrential rains， and floods we associatewith this phenomenon. At times， when a weather system does not meetall of these conditions， but is forecast to bring tropical storm or hurricaneforce winds to land in the next day or two， it is called a potential tropical cyclonein the Atlantic basin and the central and eastern North Pacific basins.

In the Atlantic， hurricane season officially runs from8to November30. Ninety-seven percent of tropical cyclone activity occurs during this time period.However， there is nothing magical about these dates. Hurricanes can and dooccur outside of this six month period.

詞组加油站

1. regardless of 不管; 不顾; 不理会

例句：All should be treated equally regardless of social status. 人不分贵贱。

2. associate with 与……交往， 联系;交接

例句：They prefer to associate with young people. 他们更喜欢与年轻人交往。