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。
"The most successful companies are those that put their customers first."
【释义】：父亲不慈爱，子女就不会孝顺；兄长不友爱，弟弟便不会恭敬。