To compare the fuels, Jacobson calculated the impacts each would have if it alone powered the entire USfleet of cars and trucks.
为了比较燃料间的区别，Jacobson分别计算了它们单独为全美车辆提供动力所产生的影响。
2
The British fleet consisted of six ships armed mostly with cannons, while the USfleet comprised nine ships armed primarily with carronades.
英国舰队有六艘战船，配备的武器多是大炮；美国舰队则有九艘战船，武器以射程较短的臼炮为主。
3
Those targets are much more aggressive than the current long-range goal for the USfleet to average 35 MPG by 2020, a 40 percent increase over today's performance.