请解释fleet在句中的含义
Fines on companies for non-compliance will start at 20 euros ($28.80) per new car for each excess gram per km in 2012 on average over the whole fleet,and rise to 95 euros g/km in 2015.
请指出fleet含义的出处,金山词霸中的解释是
fleet
[fli:t]
n.
舰队(尤指有固定活动地区的舰队),港湾,小河
adj.
快速的,敏捷的,浅的
adv.
浅
vt.
消磨
vi.
疾驰,飞逝,掠过
我感觉文中不是这里面的意思.on average 又是怎么回事?