政府的目的是人类的利益。

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

解释：处在有利的地位上想到道义，处在困难之中想到保持纯正。

Sustainability in agriculture is not an option—it's a necessity for the future of our planet.

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。