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The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.
A mathematical proof is a poem written in the language of logic.
农业不仅仅是一门生意;它是一种生活方式。
解释:冬天不洗冰水,并不是吝惜冰;夏天不烤火,也不是舍不得火。而是因为这样做对身体不适宜。
I have never been interested in the social aspects of architecture.