At the close of our studies， we knew all the past of physics， but nothing of the present and the future.
在学习结束时，我们知道物理学的所有过去，但对现在和未来一无所知。
He has not learned the first lesson of life who does not every day surmount a fear.
In chemistry, as in life, the most transformative reactions often require patience and precise conditions.
部署程序的最好方法是部署它。