作业帮 > 生物 > 作业

宠物为题的英语作文1宠物的概念2宠物给我们乐趣3宠物给我们带来麻烦4我怎样看

来源:学生作业帮 编辑:作业帮 分类:生物作业 时间:2024/05/15 15:24:19
宠物为题的英语作文
1宠物的概念2宠物给我们乐趣3宠物给我们带来麻烦4我怎样看
第一个.  扬子鳄俗称土龙,是中国惟一的鳄种.仅产于长江下游一带,原来中国还有另外一种鳄即湾鳄,但早已灭绝,因此扬子鳄显得十分珍贵,已被列为一级保护动物.  扬子鳄体长2米左右,重30-40公斤,背部为暗褐色带有*斑及条纹,腹部为灰白色,并有*小斑和横条.尾部有灰黑相间的环纹,它的四肢粗短,在陆地上活动不是十分灵敏,水中游泳则十分敏捷,它的尾巴可作为攻击和自卫的武器.  扬子鳄是一种古老的爬行动物,经历了地质史上的冰川气候和造山运动等大变化而幸存下来,在地球上活至少1亿年了.由于它的体型、构造和古代恐龙接近.因此被称为恐龙的活化石.时代算起,已被认识有三千四五百年的历史.在20世纪50年代扬子鳄的数量还相当多,因被人们大量捕杀,再加上人口增多,占领了扬子鳄适宜的生存环境,导致扬子鳄迅速减少.目前扬子鳄数量已不足500只,只限于江苏、安徽的长江南岸.为了保护扬子鳄,中国已把它列入国家一级保护动物名单,并在安徽建立了扬子鳄繁殖研究中心,旨在使这种古老的生物永远地在地球上生存下去.  宠物-以保护动物为题的英文作文.  The扬soncrocodileissocalledthesoildragon,isonlyonecrocodileinChinatogrow.BEproduceinonlyoncedownstreaminYangtzeRivertake,originallyChinesethereisalsomoreoverakindofcrocodilenamelythegulfcrocodile,butdestroycompletelyalready,sothe扬soncrocodileseemtobeveryprecious,havingalreadybeenlistasoneclassprotectionanimal..  The扬soncrocodilebodygrows2metersorso,heavy30-40kilograms,thebacktakestheyellowspotandgrainforthedarkbrown,thebellyisagreycolor,alsoyellowandsmallspotwithhorizontal.Thecodahastheashblackandalternatewreath纹,itsarmsandlegsisthickshort,theactivityisn';tveryintelligentontheland,theswimminginwaterthenisverynimble,itstailbetheweaponoftheattackandself-defense..  The扬soncrocodileisakindofancientreptile,experiencingtheglacierweatherofthegeologyhistorywithbuildthemountainsporttowaitbigvarietybutluckilysurvivedown,atontheearthlive100,000,000yearsatleast.Becauseitstypeoffigure,structureandancientdinosaurnearto.Thereforebecalleddinosaurofactivateastone.Theagesrisesonthewhole,havingalreadybeenknow3,400.Thequantityofthe扬soncrocodilein50'sin20centuriesstillverymany,becauseofbeingcaughttokillingreatquantitiesbypeople,andthepopulationincrease,capturingthe扬soncrocodilefeatexistenceenvironment,causingthe扬soncrocodilereducequickly.The扬soncrocodilequantityisn\39;tenough500alreadycurrently,southshoreinYangtzeRiverthatislimitedbyJiangsu,Anhui.Forthesakeoftheprotection扬soncrocodile,Chinahasalreadybeenincludedinitnationalaclassprotectiontheanimallist,andbuiltupthe扬soncrocodiletobreedtheresearchcenterinAnhui,theaimwasmakethiskindofancientlivingcreatureforeverBeexistingontheearthunder..  第二个.  宠物-以保护动物为题的英文作文.  目前,濒危的动物正在日益剧增.如何保护濒危动物成了我们的当务之急.人们疯狂的捕杀动物,为了它们的肉、皮毛.我们这样做是不对的,因为动物是我们的朋友,我们应该保护它们,而不是将它们赶尽杀绝.大熊猫就是濒危动物的代表,它生活在森林里,以竹子为食,它们仅仅依靠着自然保护区生存.我们应该停止对动物们的捕杀,更好地保护它们.  Therearemoreandmoreendangeredanimalsatpresent,sohowtoprotectthemhasbeenourtaskoftoppriority.It'swrongforpeopletohuntanimalsfortheirmeatandfeather,fortheyareourgoodfriends.Weshouldprotecttheminsteadofkillingthem.Giantpandas,whichareoneoftheendangeredanimals,liveintheforestsandliveonbamboolealves.Theycanjustlivesafelyinthenaturalprotectionzones.Weshouldstopkillinganimalandprotectthem..  第三个.  WithhumanbeingsonEarthsincethen,wecontinuetoevolveatthesametimehasbeenhurtthoselovelyanimals.Theydidnotatfault,theyareonlyinaccordancewiththelawsofnatureliveinpeace.Butsincetheexistenceofmankind,theirhomesbecomeincreasinglysmall.Someanimalshaveevenbecomeextinct..  Intheextinctionofanimal,thethylacineistheworst.Thylacineinalongtimeagotoliveinthevastprairie,theyhavebeenveryhappy,carefree.Sincethearrivalofhumanbeingshavechangedtheirlives.Duetothelargenumberofhumanenclosure,livestockgrassmakeslessandlesschangetomanyherbivorestomovetoothergrasslands.Thisherbivorousanimalstoeatthewolfbag,thereisnofood.Theystealhumananimals.Farmerswouldhatethewolffromthebag,seeakillingone,onthislastonewildthylacinewasalsokilled.Whenpeopleshouldbeawareofextinctthylacine,theprotectionoftheparkbeganlastathylacine,itthylacineonly48daysbeforethefinaldays.And48dayslater,theForeverthylacinedisappearedfromtheEarth,theForever!.  Ofcourse,notallanimalsareextincthumankilling,somechangesintheenvironmentarenotsuitedextinction.However,theextinctionofsomeanimals,humanbeingshaveanunshirkableresponsibility.Sinceancienttimeshumanbeingshavebeencrueltothoseanimalsalone,humandeprivationoftheirrighttolive..  Nowseemstohavebeenawareoftheextinctionofananimalhazards.Inordertomakemoney,whatpeoplearewillingtodoso,theysellfuranimals,shoppingmalls,themeatofanimalssoldtorestaurants.Butwecannotshirkallresponsibilitytotheheadsoftraders,consumersalsohavetheresponsibility,ifthereisnoconsumerdemandthenthetraderswillnottaketherisk.Humanbeingsarestilleatingwildanimals.Forexample:thesnake.Iftheextinctionofthesnakes,ratswouldwantonlybreeding,thenhowdowe.  Soeachhasitsbiologicalsignificanceoftheexistence,theyareinthenaturallawofsurvival.Ifabrokenfoodchain,thenanotherwillwantonlybreedinganimals,andevenathreattohumanity,webearinmindtheprotectionofanimals.Theprotectionofanimalsistoprotecthumanbeingsthemselves!.  参考译文:.  自从地球上有了人类以后,我们在不断地发展进化的同时也在不断的伤害着那些可爱的动物们.他们没有过错,他们只是根据自然界的法则和平的生活着.可是自从有了人类的存在,他们的家园变的越来越小.有些动物甚至已经灭绝了..  在灭绝的动物里,袋狼算是最惨的了.在很久以前袋狼生活在广阔的大草原上,它们过的很快活,无忧无虑.自从人类的到来改变了它们的生活.由于人类的大量圈地,饲养牲畜使得绿草变地越来越少,许多食草动物迁徙到别的草原上.这样以草食性动物为食的袋狼就没有了食物.它们便去偷人类饲养的动物.农场主便痛恨起了袋狼,见一个杀一个,就这样最后一只野生袋狼也被杀死了.当人们意识到袋狼就要灭绝时,才开始保护公园里的最后一只袋狼,这只袋狼才过了最后48天的好日子.而48天后,袋狼永远的从地球上消失了,永远的!.  当然不是所有灭绝的动物都是人类杀死,有的是不适应环境的变化而灭绝的.但是某些动物的灭绝,人类有着不可推卸的责任.人类自古以来就一直残忍地对待着那些动物们,人类剥夺了它们生活的权利..  现在人们似乎还没有意识到一种动物的灭绝的危害.为了赚钱人什么都愿意做,他们把动物的皮毛卖到商场,把动物的肉卖到餐馆.但是我们不能把一切责任都推卸到商贩的头上,消费者也有责任,如果没有消费者的需求那么商贩也不会铤而走险.人类还在吃着野生动物.比如:蛇.如果蛇灭绝了,老鼠会大肆繁殖,到那时候我们该怎么办…….  因此每一种生物都有它存在的意义,它们都在以自然的法则生存.如果生物链的一头断了,那么另一种动物就会大肆繁殖,甚至威胁到人类,大家记住保护动物.保护动物就是保护人类自己!.