You use all that good common sense 你使用所有这些好的常识 And you don't make excuses 你不会找借口 You work hard 你会加倍努力 And you always finish what you start 你将总能善始善终 And no matter what, you give everybody a fair sh
THE WHITE HOUSE, WASHINGTON July 4, 2009白宫，华盛顿 2009年7月4日 Today, we are called upon to remember not only the day our country was born, but also the indomitable spirit of the first American citizens who
Well, let's go back to this picture. There's one challenge symbolized at the top, but there's another challenge to science symbolized at the bottom. 好吧，让我们回到这张图片。在其上部有一个符号化了的科学挑战。而在其下部同样有一个符号化了的科学挑战。
