在高速公路，甚至乡间小路，每隔几公里就有英语教学的广告，有些看起来颇令人狐疑。
Every few kilometers on the highways and even country roads are signs for English-language classes - some teaching more dubiously than others.
有一天，我开车在高速公路，发现越来越多的广告牌是走向数字化。
The other day, I was driving down the freeway and noticed that more and more billboards are going digital.
而此次推广活动的亮点则是Google在四条美国主要高速公路上放置的广告牌，这些广告牌每天都会播送一天关于Google Apps的信息，活动持续一个月。
But the crown jewels of this campaign will be billboards on four major U.S. highways that will give a new message about Google apps everyday for a month.
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