甲醛在我们呼吸的空气中自然存在，甚至是我们人体代谢的一部分。
It occurs naturally in the air we breathe and is even part of the human metabolism.
但我们知道，生命最初始于海洋，从第一个奇特的生命体从海洋中冒出来，在空气中呼吸，在类似这里的海滨上呼吸。
Yet we know that life came out of the sea, as the first peculiar living forms flopped out, and gasped in air, on such a beach as this.
生活中确实有很多的事情值得我们感激，我们每日呼吸的空气，我们所居住的城镇，我们赖以生存的工作，在头顶上我们遮风避雨的屋顶。
There truly is so much to be grateful for, the air we breathe, the country we live in, the job that allows us to put food on the table and a roof over our heads.
在那里我们能看美丽的风景，听到鸟唱而且在新鲜的空气中呼吸。
There we can watch the beautiful scenery, hear the birds singing and breathe in the fresh air.
在那里我们能看美丽的风景，听到鸟唱而且在新鲜的空气中呼吸。
There we can watch the beautiful scenery, hear the birds singing and breathe in the fresh air.
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