prorate /prəʊˈreɪt/ (also pro-rate) ( prorating, prorated, prorates )

• 1. 

  V-T If a cost is prorated, it is divided or assessed in a proportional way. 按比例分配; 摊派 [美国英语] [usu passive]

  例：

  If weather and/or sea conditions cause your trip to return early, the boat fare will be prorated.

  如果因天气和/或海上的原因导致提前返程，会按比例退还船费。