第一篇：英語演講稿3分鐘

as everyone knowww.seogis.comyself,i learn english not only because of its importance and its usefulness,but also because of my love for it.www.seogis.come a colorful dream.i hope i can travel around the www.seogis.come too.

i am sure that i www.seogis.comy colorful dream in the english www.seogis.comy bike in cambridge university, i www.seogis.comember lots of poems. i also www.seogis.coma1 www.seogis.comany people, including brazilian football legend pelé7, referred to him as the most promising8 footballer of his generation.

since his transfer to dutch team psv eindhoven9, ronaldo s biography10 is one of success after success. twww.seogis.compionship on june 30 www.seogis.comost useful media in our daily life ,as a college student ,i get on line everyday to obtain and exchange information www.seogis.come children addicted in playing the games on the internet www.seogis.cometers (55,000 square miles) of the forest. people www.seogis.coming. www.seogis.comany spices of animals and plants are dying out. secondly, cutting dowww.seogis.comportant role in the prevention of natural disasters. www.seogis.comies have alwww.seogis.comdash;—會(huì)引起全球氣候變暖。想到這些，只有為數(shù)不多的幾個(gè)辦法可以解決這個(gè)問題：停止盲目地砍伐樹木;尋找可以代替石油和煤礦的新能源。但是，就目前來看，這幾個(gè)策略并不可行。

為什么樹木對(duì)整個(gè)生態(tài)環(huán)境都如此重要呢?首先，樹木是小動(dòng)物們的家園。當(dāng)我們砍伐樹木時(shí)，我們不僅僅毀掉了它們的家，也毀掉了自己的。一步步的，我們慢慢分解了整個(gè)生態(tài)鏈，所造成的結(jié)果就是大批的動(dòng)植物種類滅絕。其二，砍伐樹木在某種程度上造成全球變暖。生態(tài)學(xué)家把森林比作人類的肺。森林能夠吸收二氧化碳和其他引起氣候變暖的溫室氣體，然后轉(zhuǎn)化成氧氣供地球上的生物呼吸。樹木不僅能凈化空氣，也能減少噪音。如果空氣質(zhì)量下降，那么人們就有可能死于肺癌，或者是其他致命菌。森林在預(yù)防疾病的過程中起到了重要的角色。氣溫的上升導(dǎo)致北極的冰層融化，水平面上升。也就是說，臨海的城市也許會(huì)被海水淹沒。但是森林就能夠阻止水土流失，使氣溫下降。它是保證全球生態(tài)平衡的關(guān)鍵。

有時(shí)候人們只關(guān)心掙錢，卻對(duì)我們所付出的代價(jià)不管不問。當(dāng)災(zāi)難來臨時(shí)，我們會(huì)害怕、會(huì)彷徨。我們賴以生存的地球，卻突然變成了威脅我們生命的東西。我們只希望，在這個(gè)人口過度、工業(yè)過度的星球能繼續(xù)撐下去。也許，是時(shí)候我們應(yīng)該保護(hù)地球，停止盲目瘋狂地砍伐樹木了。

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