On an average a strong gale moves at the rate of40 miles an hour, a storm at about56 and hurricanes at90.
On an average a strong gale moves at the rate of40 miles an hour, a storm at about56 and hurricanes at90.
平均来说，八级大风每小时风速达40英里，十一级风暴达56英里，而十二级飓风则达90英里。