英语听力50篇-50.Typhoon

useful and instructive

The wind goes in circles, and it keeps moving higher in the sky. The warmer the air gets, the quicker the wind moves. And when the wind moves faster than 30 meters a second, a typhoon begins.

it evaporates into the air. This makes the air hot, too. When the air gets warm enough, it starts to move higher up into the sky. Then, cooler air around it rushes in to fill the space that is left. Once the air gets warmer, it starts to move more quickly, making wind.

Some of the worst storms are typhoons. Every year, about 80 typhoons hit different places around the world.The strongest ones are usually around the Pacific Ocean and the South China Sea. Most of them happen in July, August and September. 　　Why? When lots of seawater gets hot in the summer sun,

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非常好，值得学习