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英語(yǔ)導(dǎo)讀句子
50 years ago, no one talked about acid rain.50年前，沒(méi)人談?wù)撍嵊辍?/p>
Then we didn#39;t really know the harm it was causing to the world.那時(shí)，我們沒(méi)有真正了解它對(duì)世界的危害。
Today almost every adult and school child is aware of acid rain and its effects.現(xiàn)在，幾乎所有成年人和學(xué)生都認(rèn)識(shí)到酸雨及其危害性。
It affects people all around the world.它對(duì)全世界的人都有影響。
Even those who are not responsible for its creation suffer from it.即使那些與其產(chǎn)生無(wú)關(guān)的人，也被其所累。
It is caused mostly by the burning of fossil fuels.它大都是由于燃燒化石燃料而致的。
Fossil fuels are coal, gas, oil and peat and create carbon when they are burned.化石燃料指的是煤碳、天然氣、石油，它們?nèi)紵龝r(shí)會(huì)產(chǎn)生碳。
Carbon is both necessary and dangerous in our world.在我們這個(gè)世界上，碳既有用也有害。
Plants and trees need carbon dioxide, CO2, to breathe.植物和樹(shù)木需要呼吸二氧化碳。
Carbon monoxide, CO, however, is poisonous to us.一氧化碳卻對(duì)我們有害。
When carbon and other elements get into the air, they mix with water in the clouds.碳和其他的元素進(jìn)入空氣時(shí)，便與云層里的水分混合。
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