Some passengers who were among the first to undergo increased screening said they faced extensive searches in Paris, but shorter delays at Dulles Internatonal Airport outside of Washington.

VOA: standard.2010.01.05

But, um, it's very extensive, and

但是课程的覆盖面十分广泛，

哥伦比亚大学的教程 - SpeakingMax英语口语达人

But, um, it's very extensive, and

但是课程的覆盖面十分广泛，

哥伦比亚大学的教程 - SpeakingMax英语口语达人