地理

To simplify things,chemists represent each element by a one- or two- letter symbols that you need to know to understand the material in this book .Just four elements-oxygen,carbon,hydrogen,and nitrogen-make up about 96% of your body weight and that of most other living things.
化學家以你需要代表每種要素知道理解在這本書裡的素材的一個一兩個字母符號。你的體重和其他大部分生物的組成元素有96%是僅僅由4個元素:氧，碳，氫和氮所構成。

翻譯2

How can we live more sustainably? According to environmental scientists ,we should study how life on the earth has survived and adapted to major changes in environmental conditions for billions of years. We could make the transition to more sustainable societies by applying these lessons from nature to our lifestyles and economies,as summarized below and in Figure 1-13
我們怎樣才能永恆生活？根據環境科學家，我們應該研究如何在地球上生活下來，以適應主要環境條件變化的數十億年的時間。我們可以過渡到更可持續的社會運用這些經驗來自大自然給我們的生活方式和經濟，摘要如下，並在圖1-13

翻譯

Pollution is any chemical or physical change in the environment that is harmful to humans or other living organisms. Pollutants can enter the environment naturally, such as form volcanic eruptions, or through human activities, such as burning coal and gasoline.
污染是在對人或者其他活著生物體有害的環境方面的任何化學或者物理變化。 污染物能自然進入環境，像火山爆發那樣的形式，或者透過人活動，例如燃燒煤和汽油。

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