劍橋詞典a fixed set of numbers used for measuring and comparing wind speeds , from 0 (for calm ) to 12 (for hurricane ) 蒲福風(fēng)級(jí)（用于測(cè)量風(fēng)速等級(jí)，以0-12從無(wú)風(fēng)到颶風(fēng)劃分） 返回 the Beaufort scale