释义：他强调空气密度对于物质形态的决定性作用，认为物质的形态和性质都受到空气密度的影响。

A tannery's waste stream tells the story of its ethics more clearly than any mission statement.

我没时间担心谁不喜欢我。

"To live is the rarest thing in the world. Most people exist, that is all."

Innovation is the key to transforming the traditional coal industry into a modern and efficient sector.

The times they are a-changin'.

生活就是创造你自己。