问题标题：
【英语翻译theradiatorisadevicedesignedtodissipatetheheatwhichthecoolanthasabsorbedfromtheengine;itisconstructedtoholdalargeamountofwaterintubesorotherpassageswhichprovidealargeareaincontactwiththeatmosphere】
问题描述：
英语翻译
theradiatorisadevicedesignedtodissipatetheheatwhichthecoolanthasabsorbedfromtheengine;itisconstructedtoholdalargeamountofwaterintubesorotherpassageswhichprovidealargeareaincontactwiththeatmosphere.theradiatorconsistsoftopandbottomtanks,andacore.theradiatorcapservesnotonlytopreventfromsplashingoutthefilleropening,butalsopreventevaporationofthecoolant.thefanisdesignatedtodrawcoolingairthroughtheradiatorcore.thefanisusuallymountedonanextensionofthewaterpumpshaftandisdrivenbyaV-beltfromapulleymountedonthefrontendofthecrankshaft.usuallythesamebeltdrivesthealternator,andbelttensionisadjustedbyswingingthealternatoronit'smounting.
童一飞回答：
散热器是用来向外散发冷却液从发动机吸收来热量的装置,其结构中包括可以容纳大量冷却液的管道或其他用来增大与空气接触面积的通道.散热器由散热器上部水箱和底部水箱及散热器芯体组成.散热器罩不仅用于防止冷却液溅出而且用于防止冷却液的挥发.风扇设计用来驱使冷空气通过散热器芯体.风扇常常装在水泵轴的延长端上,由安装在曲轴前端的皮带轮通过V型皮带驱动.通常同一根皮带也驱动发电机,皮带的张紧力是通过调节发电机在其支架上位置来调整的.
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