First of all, we should protect the living environment of wild animals. Therefore, the foremost is to protect their habitat.

生存环境对于我们太重要了，我们必须要保护它。或对于我们来说，生活环境太重要了，我们必须要保护它。

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It is significant to research the emulsion paint of wall in the health type to the human health, protect the living environment.

研制健康型内墙乳胶漆对于人类健康、保护居住环境具有重要意义。

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The low heat engine can convert low temperature heat energy into mechanical energy, reduce energy source waste and protect the living environment.

能够把低温热能转化为机械能，减小能源浪费，保护生存环境。

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Will you say that living in a world where individuals not only want to protect their property from thieves, but also from the environment (such as fires), is a lesser value than the destruction of it (the purpose of firefighters)?

FORBES: Self Interest: The Most Life Enhancing Driver of Them All