怎么用英语介绍蝴蝶?(要短点的喔~!!)

One of the great modern science stories is the so-called "Butterfly Effect". It suggests that the weather is so sensitive to tiny changes, that something as microscopic as a butterfly flapping its wings in Brazil could set off a tornado in Texas. It's a great bit of Pop Science that has entered the common consciousness - but it's probably wrong.

Weather is that stuff that happens in the 5 million billion tonnes of air and water vapour that wraps around our planet in a thin layer.

Weather is big business on our planet. According to the World Meteorological Organisation, accurate weather forecasts improve the global economy by about $80 billion each year. Every time an aeroplane flight cancellation is avoided, that saves around $80,000 - and every time a flight is not diverted, that saves $300,000.

The modern science of weather predictions probably began in 1913, with the pacifist, physicist and mathematician, Lewis Fry Richardson.