二级笔译实务真题讲解2012

Farmerswhosetreesareteemingwithworkerants,however,donotneedtobotherwithanyofthis.InasurveyofseveralorchardsinBenin,DrvanMeleandhiscolleaguesfoundanaverageoflessthanonefruit-flypupaineachbatchof30mangoesfromtreeswhereworkerantswereabundant,buta ageof77pupaeinbatchesfromtreeswithoutworkerants.Theworkerants,itturnsout,areverythoroughabouthuntingdownandeatingfruitflies,aswellasahostofotherpests.

WorkerantshavebeenusedforpestcontrolinandotherAsiancountriesnturies.ThepracticehasalsobeenadoptedinAustralia.ButDrvanMelearguesthatitisparticularlysuitedtoAfricaseworkerantsareendemictothemango-growingregionsofthecontinent,andlittletrainingorcapitalisneededtoputthemtowork.Allyouneedslocateasuitablenestandrunstringfromittothetreesyouwishtoprotect.Theantswillthenquicklyfindtheirwaytothetarget.TeachingagroupoffarmersinBurkinaFasotouseworkerantsinthiswaytookjustaday,accordingtoDrvanMele.Thosefarmersnolongerusepesticidestocontrolfruitflies,andsoareabletomarkettheirmangoesasorganictoeagerEuropeanconsumers,vastlyreasingtheir e.Theants,sotospeak,areonthemarch.

利用工蚁防治病虫害的做法及其他亚洲国家已有数百年，澳大利亚也已予以采用。但是，范﹒梅尔博士称，非洲芒果产区工蚁特别常见，所以这种灭蝇方法对非洲特别适用，而且操作起来不需要多少培训或。果农只需要找到一个合适的蚁巢，用一根绳子将其引向果树，这样工蚁很快就可以找到果蝇。范﹒梅尔博士说，在布基纳法索培训果农只需一天时间。这些果农今后不再需要杀虫剂灭蝇，同时，还可以向热衷有机食品的欧洲消费者推销他们的有机芒果，从而大大提高收入。打个比方说，工蚁现在正向果蝇全面Therewas,lastweek,aglimmerofhopeintheworldfoodcrisis.Expectingabumperharvest,relaxedrestrictionsonexports.Overnight,globalwheatpricesfellby10percent.Bycontrast,tradersinBangkokquotericepricesaround$1,000aton,upfrom$460twomonthsago.Suchisthevolatilityoftoday’smarkets.Wedonotknowhowhighfoodpricesmightgo,norhowfartheycouldfall.Buthingiscertain:Wehavegonefromaneraofplentytooneofscarcity.Expertsagreethatfoodpricesarenotlikelytoreturntothelevelstheworldhadgrownaccustomedtoanytime

上周，世界出现了一线转机