the importance of fresh air
no air means death. although we cant see it, there is air round air is everywhere and it gives life to every living thing. without it we cant live. bad air makes people must have fresh air to keep ushealthy.
in the city there are a great many people and there are too many cars running on the roads. the gas which the cars spread out is full of poison. every day we breathe it in and out.
besides so many cars, there are many factories the chimneys of these factories, we get the smoke usually in a black or grey color. this kind of smoke, when it mies with the air, is dangerous to our health. it is because smoke contains many small poisonous soils and gases. so in
order to keep healthy we have to go out to the countryside to breathe more fresh air. or we can go up hills to get more fresh air.
新鮮空氣的重要性
沒有空氣就意味着死亡。 雖然我們看不到，但我們周圍存在着空氣。所以空氣遍佈各處，把生命帶給每種生物。沒有空氣我們沒法生存。空氣不好使人生病。我們必須有新鮮空氣才能保持健康。
城市中人口衆多，路上跑着許多汽車。汽車排放的氣體充滿了毒害；每天我們吸進呼出這些空氣。
除了有這麼多汽車，還有很多工廠。從這些工廠的煙囪裏·，我們得到的通常是黑色或灰色的煙霧。這種煙霧一旦和空氣混合，就對我們的健康產生危險。這是因爲煙霧中含有許多小的.有毒的顆粒和氣體。所以爲了保持健康我們就不得不到鄉下去呼吸更多的新鮮空氣。或者我們也可以爬山去呼吸更多的新鮮空氣。
