He also demonstrated that he can use his formidable rhetorical powers to address difficult subjects rather than simply to rev up a sympathetic crowd.

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World No.2 Federer knows formidable Czech Berdych will offer a difficult test as he bids fora place in the final and his 77th career title.

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At first, I found the magnitude of the issue difficult to grasp: Trafficking occurs in nearly every country, and its networks are vast and formidable to investigate.

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