不确定性不能成为不作为的借口。
I do not know much about it, but I think some of America's best young men served in this war.
我喜欢竞争。我喜欢那种刺激感。我喜欢挑战。我喜欢压力。
The very existence of libraries affords the best evidence that we may yet have hope for the future of man.