The story of America isn ' t about people who quit when things got tough. It ' s about people who kept going, who tried harder, who loved their country too much to do anything less than their best.

书写美国历史的不是在困难时刻退缩的人，而是坚持不懈、加倍努力的人， 他们对国家的爱促使他们全力以赴。

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McWILLIAMS: I won't say it's too tough of a standard that we have established policies, procedures and guidelines that we have to follow.

NPR: Checking In on Fort Carson, Part II

Any drivers who still think it's too tough to pass in the new car must not have been watching Busch, who made two lengthy charges up to early leads, doing it both before and after a pit-row speeding penalty dropped him back to 18th.

NPR: Matt Kenseth Holds Off Kahne To Win In Vegas

We're going to ask that everybody get health insurance, but if you still can't afford it we'll exempt you, we'll give you a hardship exemption, because there are some folks, you know, that it's just too tough.

WHITEHOUSE: President Obama Holds a Town Hall in New Hampshire