我们只有一个地球，保护地球对我们来说很重要。曾几何时，天空是那么蓝，河

我们只有一个地球，保护地球对我们来说很重要。曾几何时，天空是那么蓝，河水是那么清，森林是那么密，就在自然环境给予我们美的享受的同时，人类也要知道保护地球。以下几个建议告诉我们要如何保护地球：

結果 (英文) 1:

We only have one earth, protect the earth is very important for us. Once upon a time, the sky is so blue, the river is so clear, the forest is so dense, it is given while we enjoy the beauty of the natural environment, human beings have to know to protect the Earth. The following suggestions to tell us how to protect the Earth:

結果 (英文) 2:

We have only one earth, the protection of the earth is very important for us.Only a short while ago, the sky is so blue, the water is so clear, the forest is so dense, in the natural environment to give us the enjoyment of beauty at the same time, the human need to know to protect the earth.The following suggestions to tell us how to protect the earth:

結果 (英文) 3:

We only have one Earth, protecting the Earth is very important to us. Once upon a time, the sky is so blue, the River was so clear, forests are so dense, in giving us the beauty of the natural environment to enjoy at the same time, people also know to protect the planet. Tell us how you want to protect the Earth: