Typhoo臺(tái)風(fēng)英語(yǔ)講解幻燈片課件

Group6

Typhoon1.

Definitionsoftyphoon.2.Causes

oftyphoon.3.Thedisadvantagesoftyphoon.4.Theadvantagesoftyphoon.5.Methodsofprevention

oftyphoon.Fiveparts5.Thetyphooncenteris

calledtheeyeoftyphoon.Thediameterrangefrom10kmto70km,45kmonaverage.Thewindspeedandairpressureintheeyeoftyphoonbotharethelowest,andtheweatherappeartobewindless,partlycloudy,warmanddry.6.TheleveloftyphoonTY：Theaveragewindspeedinthecenterofbottomrangesfrom32.7m/sto41.4m/s，thelevel12-13.STY(severetyphoon)：Theaveragewindspeedinthecenterofbottomrangesfrom41.5m/sto50.9m/s，thelevel14-15.SuperTY：Theaveragewindspeedinthecenterofbottomishigherthan51.0m/s,thelevel16orhigher.(Rammasun17)

NowIwilltellyouhowtyphooncomeintobeing.Mostlyinsummerandautumnthereexiststyphoon.Inbroadseasurface,whentemperaturerisesabove26degrees,thevaporwouldgoupcausetheairnearseasurfaceislighterthantheairabove.whentheairgoesupitwillbeturnedintoliquidforthehigher,thecolder,releasingmoreheat,whichhelpsthelowerairgoesup.Anditcontinuesandcycles.Andtheliquidisheavierthanair,sotheairdroppeddownandthereisarainfall.Becauseofthecoriolisforceitbecomesrollingaroundandaround.Thentyphoonisthere.Whentyphoonarrivesatlands,treesandbuildingswillcutdownitsforce,makinglessdamageandloss.Parttwo:Causes

ofTyphoonPartthree:disadvantagesoftyphoon

1.Typhoonmay

destroy

thecrops.2.Typhoonisoneoftheweathersystems

thatbringsheavyrain.inthetyphoon

area,

mayproduceheavyrain.

3.Theweather

oftenbringsabout

adangeroussituationcausedby

typhoon,theseawaves,

aseriousthreatto

thesafetyofnavigation.Afterthelandingoftyphoon

stormsurge

,

the

water

candestroycrops,allkindsofbuildings,resultinginheavylossesoflifeand

propertyofthepeople.Partfour:theadvantagesoftyphoon1.Typhoonbringsabundantfreshwater.2.Typhooncauses

tropical

cooling.

Ifthereisno

typhoon,

tropical

willbemore

hot,

boreal

willbemore

cold,and

temperate

zonewilldisappear.3.

Typhoon

canincreasefishproduction

.4.Typhoon

makespeopleliveandworkinpeace.Atsea:1.

Beforethetyphoon,youshould

immediately

findaplaceforyou

totakeshelterfromthewind.2.Ifyouarecaughtinatyphoon,you

shouldtimely

ask

therelevantdepartments

forhelp.3.

Whenyouarewaitingfor

rescue,you

should

take

emergency

measuresquicklyawayfromtyphoon.Partfive:Methodsofprevention

of

typhoon.Athome:1.Closethedoorandwindow.2.Movefromthe

oldhousetoasafe

place.3.

Bringyouroutdoorthingsin.Onoutside:1.Ifyouareoutside,

lookfor

tallbuildings

toescape,

soasnottobe

blownawaybypowerfultyphoon.2.

Donotstand

indangerousplaces,

suchas:thin

objects.References1.臺(tái)風(fēng).百度百科.（/link?url=BINZbFSyRv-NB0Exy-M-ecziZFZUHmmDad9bMUa0M1rL9YdPDLDtssStis-Cv5Lp6sV6qZ9kLPjkNcumU9NseoCiU9t-ZeP6zJl6OD0Ucvu）2.熱帶氣旋.百度百科.（/link?url=QksrPQj-O6gEW