用后者.习惯用法.
例如：绯闻女孩第2季第23集
As fast as I can,given my current transportation situation.
Hey,Chuck,I really am sorry for not Believing you and Blair earlier.
尽快吧,取决于我现在的交通工具.
恰克,我很抱歉之前,不相信你和布莱尔的话.
我刚刚又查了下.我发觉英式英语习惯用transport,美式的则用transportation.