American firms used to be allowed to amortise goodwill over many years.

过去美国企业许将商誉在很多年内逐步摊销。

This might not matter to a sophisticated economist, who would amortise the battery cost over the life of the vehicle.

这也许不会令些顽固老练经济学家感冒，因为他们懂得把成本分摊到汽车寿命上。