首先，它们使我们呼吸的空气更清新。
氧气是我们呼吸的空气的一部分。
我们利用植物获得食物、布料、住所，甚至是我们呼吸的空气。
We use plants for food, cloth, shelter (住处) , and even the air we breathe (呼吸) .
由于氮占我们呼吸的空气的五分之四，他们对提高火星的温度持惊人的乐观态度，相信这可以在一百年内完成。
Since nitrogen is four fifths of the air we breathe, they are surprisingly optimistic about raising the temperature on Mars and believe it could be done in hundred years.
我们呼吸的空气，我们吃的食物。
现在我们呼吸的空气是被污染的。
爱就像我们呼吸的空气一样。
书籍价廉物美，不啻我们呼吸的空气。
They are to be had very cheap and good. We breathe but the air of books.
书籍价廉物美，不啻我们呼吸的空气。
They are to be very cheap and good. We breathe but the air of books.
有许多资料表明我们呼吸的空气已受到污染。
There is much information to show that the air we breathe is polluted.
我们呼吸的空气和我们喝的水不像以前一样干净。
The air we take in and the water we drink are not as fresh and clean as they used to be.
我们呼吸的空气是珍贵的，越是远离地球表面越是稀薄。
The air you breathe is precious, and the farther from Earth's surface you go, the less there is.
我们喝的水，我们吃的食物，我们呼吸的空气，都被污染。
The water we drink, the food we eat, the very air that we breathe, are threatened with pollution.
空气污染并不仅仅污染了我们呼吸的空气，也污染了海洋。
Air pollution doesn't just pollute the air we breathe; it fouls the oceans as well.
休息对于健康身体的重要性就相当于我们喝的水和我们呼吸的空气。
Rest is as essential to our physical health as the water we drink and the air we breathe.
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.
听起来挺俗气的，但是嘿，只要它有利于我们呼吸的空气不就行了吗？
This was extremely cheesy, but hey, as long as it benefits the air we breathe, right?
这是我们呼吸的空气，这是我们品味的花朵，这是我们饮用的清水。
The air we breathe, the flower we smell, the water we drink.
与我们同时代的伟人显得比较普通，因为他们也呼吸我们呼吸的空气。
Those who are great and live among us seem more normal because they're breathing the same air that we are.
必须注意的是：我们呼吸的空气已经被工厂和交通工具所释放的废气严重污染了。
It has to be noticed that the air we breathe is already seriously polluted by the exhaust factories and vehicles give off.
我们呼吸的空气不按体积来卖，从山中小溪涌流出清澈的水源也是供我们免费来饮的。
The air we breathe is not sold by the cubic foot. The water which flows crystal clear from the mountain stream is free for the taking.
骑自行车，跳巴士或地铁，都有助于减少污染我们呼吸的空气，因为它意味着离开汽车在家里。
Riding a bike, hopping a bus or taking the subway all help reduce pollution in the air we breathe, since it means leaving a car at home.
最后，科学家们想弄明白我们呼吸的空气分子到底经历了什么变化，借此找到健康防护的新方向。
In the end, scientists want to know exactly what's going on with the molecules that we breathe - and they hope this information will help us find new ways to protect our health.
天气、气候和我们呼吸的空气，由于今天这个世界气象日的题材，提醒我们他们之间的密切的关系。
Weather, climate and the air we breathe, the theme of World Meteorological Day this year, reminds us of the close relationship between them.
天气、气候和我们呼吸的空气，由于今天这个世界气象日的题材，提醒我们他们之间的密切的关系。
Weather, climate and the air we breathe, the theme of World Meteorological Day this year, reminds us of the close relationship between them.
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