【英语翻译Belowisaselectionfromapopularsciencebook.（标题1）Ifbloodisred,whyareveins（静脉）blue?Actually,veinsarenotblueatall.Theyaremoreofaclear,yellowishcolor.Althoughbloodlooksredwhenit’soutsidethebody,】|小学英语问答-字典翻译问答网

问题标题：

【英语翻译Belowisaselectionfromapopularsciencebook.（标题1）Ifbloodisred,whyareveins（静脉）blue?Actually,veinsarenotblueatall.Theyaremoreofaclear,yellowishcolor.Althoughbloodlooksredwhenit’soutsidethebody,】

问题描述：

英语翻译

Belowisaselectionfromapopularsciencebook.

（标题1）Ifbloodisred,whyareveins（静脉）blue?

Actually,veinsarenotblueatall.Theyaremoreofaclear,yellowishcolor.Althoughbloodlooksredwhenit’soutsidethebody,whenit’ssittinginaveinnearthesurfaceoftheskin,it’smoreofadarkreddishpurplecolor.Attherightdepth,theseblood-filledveinsreflectlessredlightthanthesurroundingskin,makingthemlookbluebycomparison.

（标题2）Whichworksharder,yourheartoryourbrain?

Thatkindofdependsonwhetheryou’rebusythinkingorbusyexercising.Yourheartworksuptothreetimesharderduringexercise,andshiftsenoughbloodoveralifetimetofillasupertanker.But,inthelongrun,yourbrainprobablytipsit,becauseevenwhenyou’resittingstillyourbrainisusingtwiceasmuchenergyasyourheart,andittakesfourtofivetimesasmuchbloodtofeedit.

看不懂,而且本人翻译的也不好,

孙东光回答：

　　以下内容选自一本科普读物. 　　I.既然血液是红色的,为什么静脉是蓝色的呢? 　　事实上,静脉并非蓝色的,而是更接近淡黄色.尽管在人体外的血液看起来是红的,但在皮肤浅表的静脉里,它更接近紫色,但又略显暗红.在皮肤深层,这些充血的静脉反射出的红色光线稍逊于周边的皮肤,反衬之下就呈蓝色了. 　　II.哪个工作更忙,心脏还是大脑? 　　这要看你是忙于思考还是忙于运动.在运动时,心脏的工作强度足足是大脑的三倍,在人的一生中传输的血液足以装满一个超级油箱.但是,从长期来看,大脑很可能更忙,因为即使人坐着不动,大脑消耗的能量仍然是心脏消耗的两倍,因此它也需要四到五倍的血液来供应.

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