以“小昆蟲(chóng)本領(lǐng)大”為題的英語(yǔ)作文及譯文
Think twice before you swat a fly or squash a bug: A new study says insects contribute more than $57 billion (euro47 billion) a year to the U.S. economy.
Think twice before you swat a fly or squash a bug: A new study says insects contribute more than $57 billion (euro47 billion) a year to the U.S. economy.
And that is a very conservative estimate, said John Losey, a Cornell University associate professor of entomology who conducted the study, published in the current issue of the journal BioScience.
"Most insects tirelessly perform functions that improve our environment and lives in ways that scientists are only beginning to understand,‘‘ said Losey, who wrote the study with Mace Vaughan of the Portland, Oregon-based Xerces Society for Invertebrate Conservation.
There are more than 1 million named insect species _ and probably an equal number unidentified _ making them the most abundant life form on the planet.
The study focused on four particular services that bugs provide, and what the cost would be if the insects were gone:
Nutrition for wildlife. The researchers looked at how much is spent annually on observing or hunting wildlife, and how much these animals depend on insects for food. Value: $50 billion (euro41.3 billion).
Pest control. Insects often prey on other insects. The researchers looked at the amount of damage done by pests, and the losses that would result if their predators disappeared. Value: $4.5 billion (euro3.7 billion).
Pollination. The researchers looked at the value of crops that are insect-pollinated (not including crops pollinated by domesticated honeybees). Value: $3 billion (euro2.5 billion).
Dung burial. If not for dung beetles, manure on grazing land would attract more flies and parasites that farmers would have to control. Also, dung beetles help return nutrients to the soil. Without them, farmers would have to spend more on fertilizer. Value: $380 million (euro314 million).
The study focused only on wild insects and did not count the value of commercially produced insect-derived products, such as honey and silk.
Lawrence Abrahamson, an entomologist at the State University of New York, agreed the $57 billion (euro47 billion) figure is conservative.
"Most people think of insects and go yuck. They think about mosquitoes and flies. They don‘t realize just about everything in life is affected some way, somehow, by insects,‘‘ he said.
"小昆蟲(chóng)本領(lǐng)大"英語(yǔ)作文譯文:
當(dāng)你揮動(dòng)蒼蠅拍想要打死一只蒼蠅或臭蟲(chóng)時(shí)，最好三思而后行。因?yàn)橐豁?xiàng)最新的研究結(jié)果顯示，昆蟲(chóng)每年給美國(guó)經(jīng)濟(jì)帶來(lái)的貢獻(xiàn)竟然超過(guò)了570億美元之多。
據(jù)美聯(lián)社日前報(bào)道，這項(xiàng)研究的負(fù)責(zé)人、美國(guó)科內(nèi)爾大學(xué)的昆蟲(chóng)學(xué)副教授約翰·羅賽對(duì)此表示，不僅如此，而且上述數(shù)字還是一個(gè)非常保守的估計(jì)。他說(shuō)：“大部分昆蟲(chóng)都在不知疲倦地行使著改善人們生活環(huán)境的職責(zé)，而它們所用的這些方式科學(xué)家們才剛剛開(kāi)始了解�！�
目前，有超過(guò)100萬(wàn)種已命名的昆蟲(chóng)種類，而且可能還有相同數(shù)量的未經(jīng)確認(rèn)的.昆蟲(chóng)，這使它們成為地球上生活方式最為豐富多彩的物種。
諸多好處 一一列舉
此項(xiàng)研究將重點(diǎn)放在了昆蟲(chóng)向人們提供的4種特殊服務(wù)以及如果這些小蟲(chóng)消失不見(jiàn)，人們?cè)谶@些方面應(yīng)該相應(yīng)付出的花費(fèi)上。
1、野生動(dòng)物的營(yíng)養(yǎng)。研究人員對(duì)美國(guó)每年觀察或捕獵野生動(dòng)物花費(fèi)多少，以及這些動(dòng)物中有多少以昆蟲(chóng)作為食物進(jìn)行了研究。研究得出的結(jié)論是，昆蟲(chóng)對(duì)美國(guó)經(jīng)濟(jì)的貢獻(xiàn)價(jià)值為500億美元。
2、控制害蟲(chóng)。昆蟲(chóng)經(jīng)常以其它昆蟲(chóng)為食。因此，研究人員對(duì)害蟲(chóng)造成的危害以及如果這些害蟲(chóng)的天敵消失，美國(guó)將要為此遭受的損失進(jìn)行了分析研究。研究得出的結(jié)果是，昆蟲(chóng)對(duì)美國(guó)經(jīng)濟(jì)的貢獻(xiàn)價(jià)值為45億美元。
3、授粉。研究人員還對(duì)那些由昆蟲(chóng)授粉的農(nóng)作物(不包括那些由馴化蜜蜂授粉的農(nóng)作物)的價(jià)值進(jìn)行了估算。并由此得出結(jié)論，昆蟲(chóng)對(duì)美國(guó)經(jīng)濟(jì)的貢獻(xiàn)價(jià)值為25億美元。
4、消化糞便。如果不是蜣螂(屎克螂)這種小昆蟲(chóng)在幫忙，那么在土地上施肥就會(huì)吸引更多的蒼蠅和寄生蟲(chóng)，這樣農(nóng)民們就不得不想辦法來(lái)解決這個(gè)問(wèn)題。另外，屎克螂還有助于將營(yíng)養(yǎng)物質(zhì)重新輸送回土壤。如果沒(méi)有它們，辛勤勞作的農(nóng)民們就要花費(fèi)更多的錢(qián)來(lái)購(gòu)買(mǎi)肥料。由此，研究人員得出的結(jié)論是，在這方面昆蟲(chóng)對(duì)美國(guó)經(jīng)濟(jì)的貢獻(xiàn)價(jià)值為3.8億美元。
報(bào)道說(shuō)，此項(xiàng)研究的對(duì)象僅僅為野生昆蟲(chóng)為美國(guó)社會(huì)創(chuàng)造的財(cái)富，并不包括諸如蜂蜜和絲綢等由昆蟲(chóng)帶來(lái)的商業(yè)產(chǎn)品的價(jià)值。這項(xiàng)研究的具體結(jié)果發(fā)表在最近一期的《生物科學(xué)》雜志上。
【以“小昆蟲(chóng)本領(lǐng)大”為題的英語(yǔ)作文及譯文】相關(guān)文章：
以小猴學(xué)本領(lǐng)為題的小學(xué)作文07-10
英語(yǔ)小作文及譯文05-23
以學(xué)本領(lǐng)為題的小學(xué)作文07-11
以小烏龜為題的作文09-28
以小感動(dòng)為題的作文04-07
以小幸福為題的作文07-02
以感恩為題小作文12-18