Between 1814 and 1834, New Orleans steamboat arrivals increased from 20 to 1,200 a year.
Between 1814 and 1834, New Orleans steamboat arrivals increased from 20 to 1,200 a year.
在1814年到1834年之间，到达纽奥良的蒸汽船班次从一年20班次增加到1200班次。
Between 1814 and 1834, New Orleans steamboat arrivals increased from 20 to 1,200 a year.
在1814年到1834年之间，到达纽奥良的蒸汽船班次从一年20班次增加到1200班次。