皮革行业必须进化，否则就有被淘汰的风险。

The real moral test of a society is how it treats those who are at the dawn of life, the children; those who are in the twilight of life, the aged; and those who are in the shadow of life, the sick, the needy and the handicapped.

Learning is the process of modifying symbolic structures to improve performance.

政事分散在地方，但大权集中在中央

Mathematics is the music of reason.

化学的艺术在于能够分离、识别并确定构成物质的成分及其数量。

表演不是要成为不同的人。它是在明显不同的事物中找到相似之处，然后在那里找到自己。