约翰·鲍尔是爱尔兰一家公司的工程师,而他的妻子和女儿居住在比利时安特卫普,因此,他每周都要搭乘飞机回家两次。每次回家,鲍尔都会大包小包地给妻女带很多礼物和玩具。尽管鲍尔经常会选择搭乘一些比较经济的航空公司,但是每年乘坐飞机的费用累加起来依然让他觉得难以承受,因为航空公司往往会针对乘客的行李收取额外的托运费用。比如,爱尔兰的瑞安航空公司 John Bauer is an engineer at an Irish company, and his wife and daughter live in Antwerp, Belgium, so he goes home by plane twice a week. Each time he returns home, Bauer brings a large bag of presents and toys to his wife and daughter. Although Powell often chooses to take some of the more economical airlines, the annual cost of flying together still makes him feel unbearable, as airlines often charge extra for passenger baggage. For example, Ryanair in Ireland