A man knows when he is growing old because he begins to look like his father.

数学是一项协作的努力。没有人可以单独完成。

Every material has its own memory and history.

我不是为评论家唱歌，我是为歌迷唱歌。

We are all leaves on the great tree of evolution.

The key to success is to get out into the store and listen to what the associates have to say. It's terribly important for everyone to get involved. The best ideas come from the floor.