Unit 4 Weather and Climate 中职教学课件

Unit4WeatherandClimateOverviewText1WhatMakestheWeather?Text2TypesofClimateScanningDothereadingcomprehensionexerciseonpage48and49.Keywordsandexpressionsfluctuate

(L1)v[I,Ipr]~(betweenAandB)1(ofaprice,number,rate,etc)riseandfall;changeirregularly（指价格﹑数量﹑比率﹑费用等）涨落,波动:Thepricefluctuatesbetween5and6.价格在5英镑与6英镑之间波动.

2(ofanattitudeorastate)changecontinuallyandirregularly;waver（指态度或状态）变化不定,动摇:fluctuatingopinions

变化不定的意见.fluctuation

[C,U]~(of/insth):widefluctuationsoftemperature温度的巨大变化fluctuationsinthestateofhishealth

他健康状况时好时坏的变化.prevail

(L5)v[I]~(among/insth/sb)existorhappengenerally;bewidespread普遍存在;普遍发生;盛行;流行:

Theuseofhorsesforploughingstillprevailsamongthepoorerfarmers.用马耕作的现象在贫苦农民中仍然十分普遍.

[I,Ipr]~(against/oversb/sth)(fml文)fightsuccessfully(againstsb/sth);defeat战胜（某人[某事物]）;击败:Virtuewillprevailagainstevil.美德定将战胜邪恶.prevailingadj[attrib作定语](a)普遍的;盛行的;流行的:theprevailingcustoms,fashions,style,etc

流行的风俗﹑式样﹑款式等.(b)（指风）某一区域里最常刮的:Theprevailingwindhereisfromthesouth-west.这里最常刮的风是西南风.slanting,vertical(L9)equator(L16)赤道Globe-relatedwords北、南回归线tropicofCancer/Capricorn北、南半球northern/southernhemisphere地轴axis北、南极North/SouthPole北、南极圈Arctic/AntarcticCircle经、纬线thelineoflongitude/latitudesaturatedadj[L42]

1[usupred通常作表语]verywet;soaked极湿;湿透:Iwentoutintherainandgotsaturated.我冒着雨出门,浑身都淋透了.

2[usuattrib通常作定语](chemistry化)(ofasolution)containingthegreatestpossibleamountofthedissolvedsubstance（指溶液）饱和的:asaturatedsolutionofsalt

饱和的食盐溶液.condense

(L43)v[I,Ipr,Tn,Tn.pr]~(sth)(into/tosth)(a)(causesthto)becomethickerormoreconcentrated（使某物）变稠或变浓;浓缩:

condensedmilk,soup,etc

炼乳﹑浓缩汤等.(b)(causesthto)changefromgasorvaportoaliquid（使某物）由气体或蒸气变成液体;凝结:Steamcondenses/iscondensedintowaterwhenittouchesacoldsurface.蒸气接触冷的表面而凝结成水珠.constant

(L50)1[usuattrib通常作定语]goingonallthetime;happeningagainandagain经常的;不断发生的:constantchattering,complaints,interruptions没完没了的饶舌﹑抱怨﹑打搅2unchanging;fixed不变的;恒定的;稳定的:aconstantspeed,value,etc恒定速度﹑恒值等Pressureinthecontainerremainsconstant.容器中的压力保持恒定不变.variation

(L52)[C,U]~(in/ofsth)(degreeof)varyingorbeingvariant变化,变动,变异（的程度）:Priceshavenotshownmuchvariationthisyear.今年物价没显出多大变化.Currencyexchangeratesarealwayssubjecttovariation.货币兑换率是经常变的.

SentenceLearningMusicsentoutbyaradiotransmitterdoesnotfilltheairwithsoundsforalltohear.Instead,themusictravelsintheformofelectromagneticwaves,whichmustpassthroughareceiverandanamplifiertobeheard.(L17）无线发射器传送的音乐并没有使空气中充满人们能听见的声音，而是以电磁波的形式在经过接收器和扩音器之后才能被人们听见。TypesofClimateScanningDothereadingcomprehensionexerciseonpage58and59.Translation降雨量theamountofrainfall热带雨林tropicalrainforest热带草原气候tropicalwet-and-dryclimate/tropicalsavanna热带沙漠气候tropicaldesertclimate地中海气候Mediterraneanclimate西风westerlywinds用材林timberforest湿润的大陆性气候humidcontinentalclimate极地气候polarclimate高原气候highlandclimate洋流oceancurrent拉布拉多洋流LabradorCurrent湾流/墨西哥湾暖流GulfStream季风monsoon/mɔnˋsuːn/SentencelearningThewatercyclecanbecontrolledinpartforashorttimebystoringwaterinreservoir