[al:新概念英语（第1册）第129课（听力强化·美英）]
[ti:Seventy Miles an Hour－时速70英里
[ar:© 2011 露珠英语工作室]
[by:http://weibo.com/DewEnglishStudio]
[00:00.00]You must have been driving at 70 miles an hour.－你刚才一定是以每小时70英里的速度开车。