元素若按其原子量排列，会呈现出性质的周期性。
Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.
"Political language is designed to make lies sound truthful and murder respectable, and to give an appearance of solidity to pure wind."
The real voyage of discovery consists not in seeking new landscapes, but in having new eyes.
Sustainable development requires balancing short-term profits with long-term value creation.