America 's wars in iraq and afghanistan have testified eloquently to the limits of hard power .
美國在伊拉克和阿富汗的戰爭雄辯地證明了硬實力的局限性。
' One of things they have said quite eloquently is that not even harvard can afford to keep up with the rising price of information , ' said tom leonard , chief librarian at the university of california berkeley .