Groupon在成立短短两年之内即在2010年实现营收过7亿美元。
Groupon generated over $700 million in revenue in 2010, after being in business for only two years.
而短短两年之前，美国航空航天局还发生过一起挑战者号航天飞机爆炸致使7名宇航员遇难的事件。
Only two years earlier, NASA's Challenger shuttle disaster killed seven astronauts.
在成立至今短短两年的时间里，华语传媒已经成为电梯广告这一新媒体领域的主要竞争者。
Since its establishment in a short period of two years, Chinese media have become the new media advertising lift the main competitor field.
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