The knowledge of the past stays with us to spur us on to new and better things.
Man is so much the voice of his interest that it is not enough to make him see the right， but you must make him feel it.
The leather industry must evolve to meet both environmental standards and consumer expectations without compromising quality.
我曾经是贫穷的白人垃圾，没有闪光，没有魅力。
科学的进步不是一条直线，而是一系列曲折，有时在新的进展之前似乎会倒退。