“火山”的英语单词是：volcano【vɒl'keɪnəʊ】
短语：
1、danceonavolcano在火山上跳舞；大难将至犹自作乐
2、extinctvolcano死火山；精力衰退的人；丧失活力的人
3、sitonavolcano置身于火山口上，处境危险
例句：
1、Lavaboiledupfromthecraterofthevolcano.
熔岩从火山口喷出。
2、Ashandcindersblazeddownfromtheeruptingvolcano.
炽热的火山灰和火山渣从爆发的火山纷纷喷发落下。
3、Thatnight,IwatchedhimrappelintotheareanearamoltenvolcanoontheislandofHawaii.
那天晚上，我看着他顺着绳索下到夏威夷岛上一个熔化的火山附近地区。
4、Untiladecadeago,mostscientiststhoughtthatonlyavolcanocoulddoso.
直到十年前，大多数科学家认为只有火山才有这样的能量。
5、Balloon,baseball,basketball,footballandvolleyballalldanceballetonthevolcano.
气球、棒球、篮球、足球和排球都在火山上跳芭蕾舞。
Acraterlakeisalakethatformsinavolcaniccraterorcaldera,suchasamaar;lesscommonlyandwithlowerassociationtothetermalakemayforminanimpactcratercausedbyameteorite.Sometimeslakeswhichforminsidecalderasarecalledcalderalakes,butoftenthisdistinctionisnotmade.Craterlakescoveringactive(fumarolic)volcanicventsaresometimesknownasvolcaniclakes,andthewaterwithinthemisoftenacidic,saturatedwithvolcanicgases,andcloudywithastronggreenishcolor.Lakeslocatedindormantorextinctvolcanoestendtohavefreshwater,andthewaterclarityinsuchlakescanbeexceptionalduetothelackofinflowingstreamsandsediment.Awell-knowncraterlake,whichbearsthesamenameasthegeologicalfeature,isCraterLakeinOregon,USA.ItislocatedinthecalderaofMountMazama,hencethename"CraterLake"issomethingofamisnomer.ItisthedeepestlakeintheUnitedStateswithadepthof594m(1,949ft).CraterLakeisfedsolelybyfallingrainandsnow,withnoinfloworoutflowatthesurface,andhenceisoneoftheclearestlakesintheworld.[1]Thehighestvolcanointheworld,6,893metres(22,615ft)OjosdelSalado,hasapermanentcraterlakeabout100metres(300ft)indiameteratanelevationof6,390m(20,960ft)onitseasternside.[2]Thisismostlikelythehighestlakeofanykindintheworld.Duetotheirunstableenvironment,somecraterlakesexistonlyintermittently.Calderalakesincontrastcanbequitelargeandlong-lasting;forinstance,LakeTobaformedafteritseruptionaround70,000yearsagoandhasanareaofover1,000squarekilometres.。
Acraterlakeisalakethatformsinavolcaniccraterorcaldera,suchasamaar;lesscommonlyandwithlowerassociationtothetermalakemayforminanimpactcratercausedbyameteorite.Sometimeslakeswhichforminsidecalderasarecalledcalderalakes,butoftenthisdistinctionisnotmade.Craterlakescoveringactive(fumarolic)volcanicventsaresometimesknownasvolcaniclakes,andthewaterwithinthemisoftenacidic,saturatedwithvolcanicgases,andcloudywithastronggreenishcolor.Lakeslocatedindormantorextinctvolcanoestendtohavefreshwater,andthewaterclarityinsuchlakescanbeexceptionalduetothelackofinflowingstreamsandsediment.
Awell-knowncraterlake,whichbearsthesamenameasthegeologicalfeature,isCraterLakeinOregon,USA.ItislocatedinthecalderaofMountMazama,hencethename"CraterLake"issomethingofamisnomer.ItisthedeepestlakeintheUnitedStateswithadepthof594m(1,949ft).CraterLakeisfedsolelybyfallingrainandsnow,withnoinfloworoutflowatthesurface,andhenceisoneoftheclearestlakesintheworld.[1]
Thehighestvolcanointheworld,6,893metres(22,615ft)OjosdelSalado,hasapermanentcraterlakeabout100metres(300ft)indiameteratanelevationof6,390m(20,960ft)onitseasternside.[2]Thisismostlikelythehighestlakeofanykindintheworld.
Duetotheirunstableenvironment,somecraterlakesexistonlyintermittently.Calderalakesincontrastcanbequitelargeandlong-lasting;forinstance,LakeTobaformedafteritseruptionaround70,000yearsagoandhasanareaofover1,000squarekilometres.