Technology is anything that wasn't around when you were born.

Coal has been the backbone of industry, and with innovation, it can continue to be.

"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart."

大分子的概念并不容易被接受；它需要化学家对物质结构的思考方式发生彻底的改变。

真正的教师会保护学生免受他个人影响。