英语翻译
Wavesarebeautifultolookat,buttheycandestroy(@@)shipsatsea,aswellashousesand
buildingsneartheshore.Whatcauseswaves?Mostwavesarecausedbywindsblowingoverthesurfaceofthewater.Thesunheatstheearth,causingtheairtoriseandthewindstoblow.Thewindsblowacrossthesea,pushinglittlewavesintobiggerandbiggerones.
Thesizeofawavedependsonhowstrongthewindis,howlongitblows,andhowlargethebodyofwateris.Inasmallbay(海湾)bigwaveswillneverbuildup.Butatseathewindcanbuildupgiant,powerfulwaves.
Arulesaysthattheheightofawave(inmeters)willusuallybenomorethanone-tenthofthewind''sspeed(inkilometers).Inotherwords,whenthewindisblowingat120kilometersperhour,mostwaveswillbeabouttwelvemeters.Ofcourse,somewavesmaycombinetoformgiantwavesthataremuchhigher.Li1933theUnitedStatesNavy(海军)reportedthelargestmeasuredwaveinhistory.ItroseinthePacificOceantoaheightofthirty-fourmeters