| Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man. They do not provide energy, nor do they construct or build any part of the body. They are needed for transforming foods into energy and body maintenance. There are thirteen or more of them, and if any is missing a deficiency disease becomes apparent. Vitamins are similar because they are made of the same elements -- usually carbon, hydrogen, oxygen, and sometimes nitrogen. They are different in that their elements are arranged differently, and each vitamin performs one or more specific functions in the body. Getting enough vitamins is essential to life, although the body has no nutritional use for excess vitamins. Many people, nevertheless, believe in being on the 'safe side' and thus take extra vitamins. However, a well-balanced diet will usually meet all the body's vitamin needs. | |
| 维生素是有机化合物，饮食中必须含有少量维生素以维持动物(包括人)的生存和正常生长。 它们不提供能量，也不构成身体的任何一部分，它们的任务是把食物转变成能量和维持身体健康。至少有 13 种维生素，若缺其中一种，缺乏症疾病便明显可见。 各种维生素都很相似，因为它们由同样的元素构成，一般是碳、氢、氧，有时还有氮。它们的不同之处在于每种维生素内部的元素排列不同，并且每种维生素在人体内都有一种或多种特殊作用。 虽然维生素对人体并无什么营养上的用处，但吸收足够的维生素是必要的。尽管如此，有些人出于保险的想法，还是摄入过量的维生素。不过，均衡的饮食一般能够完全满足身体对维生素的需求。 |
| Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man. They do not provide energy, nor do they construct or build any part of the body. They are needed for transforming foods into energy and body maintenance. There are thirteen or more of them, and if any is missing a deficiency disease becomes apparent. Vitamins are similar because they are made of the same elements usually carbon, hydrogen, oxygen, and sometimes nitrogen. They are different in that their elements are arranged differently, and each vitamin performs one or more specific functions in the body. Getting enough vitamins is essential to life, although the body has no nutritional use for excess vitamins. Many people, nevertheless, believe in being on the ' safe side' and thus take extra vitamins. However, a wellbalanced diet will usually meet all the body' s vitamin needs. | |
| wei sheng su shi you ji hua he wu, yin shi zhong bi xu han you shao liang wei sheng su yi wei chi dong wu bao kuo ren de sheng cun he zheng chang sheng zhang. ta men bu ti gong neng liang, ye bu gou cheng shen ti de ren he yi bu fen, ta men de ren wu shi ba shi wu zhuan bian cheng neng liang he wei chi shen ti jian kang. zhi shao you 13 zhong wei sheng su, ruo que qi zhong yi zhong, que fa zheng ji bing bian ming xian ke jian. ge zhong wei sheng su dou hen xiang si, yin wei ta men you tong yang de yuan su gou cheng, yi ban shi tan qing yang, you shi hai you dan. ta men de bu tong zhi chu zai yu mei zhong wei sheng su nei bu de yuan su pai lie bu tong, bing qie mei zhong wei sheng su zai ren ti nei dou you yi zhong huo duo zhong te shu zuo yong. sui ran wei sheng su dui ren ti bing wu shen me ying yang shang de yong chu, dan xi shou zu gou de wei sheng su shi bi yao de. jin guan ru ci, you xie ren chu yu bao xian de xiang fa, hai shi she ru guo liang de wei sheng su. bu guo, jun heng de yin shi yi ban neng gou wan quan man zu shen ti dui wei sheng su de xu qiu. |
| Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man. They do not provide energy, nor do they construct or build any part of the body. They are needed for transforming foods into energy and body maintenance. There are thirteen or more of them, and if any is missing a deficiency disease becomes apparent. Vitamins are similar because they are made of the same elements usually carbon, hydrogen, oxygen, and sometimes nitrogen. They are different in that their elements are arranged differently, and each vitamin performs one or more specific functions in the body. Getting enough vitamins is essential to life, although the body has no nutritional use for excess vitamins. Many people, nevertheless, believe in being on the ' safe side' and thus take extra vitamins. However, a wellbalanced diet will usually meet all the body' s vitamin needs. | |
| wéi shēng sù shì yǒu jī huà hé wù, yǐn shí zhōng bì xū hán yǒu shǎo liàng wéi shēng sù yǐ wéi chí dòng wù bāo kuò rén de shēng cún hé zhèng cháng shēng zhǎng. tā men bù tí gōng néng liàng, yě bù gòu chéng shēn tǐ de rèn hé yī bù fen, tā men de rèn wù shì bǎ shí wù zhuǎn biàn chéng néng liàng hé wéi chí shēn tǐ jiàn kāng. zhì shǎo yǒu 13 zhǒng wéi shēng sù, ruò quē qí zhōng yī zhǒng, quē fá zhèng jí bìng biàn míng xiǎn kě jiàn. gè zhǒng wéi shēng sù dōu hěn xiāng sì, yīn wèi tā men yóu tóng yàng de yuán sù gòu chéng, yì bān shì tàn qīng yǎng, yǒu shí hái yǒu dàn. tā men de bù tóng zhī chǔ zài yú měi zhǒng wéi shēng sù nèi bù de yuán sù pái liè bù tóng, bìng qiě měi zhǒng wéi shēng sù zài rén tǐ nèi dōu yǒu yī zhǒng huò duō zhǒng tè shū zuò yòng. suī rán wéi shēng sù duì rén tǐ bìng wú shén me yíng yǎng shàng de yòng chǔ, dàn xī shōu zú gòu de wéi shēng sù shì bì yào de. jǐn guǎn rú cǐ, yǒu xiē rén chū yú bǎo xiǎn de xiǎng fǎ, hái shì shè rù guò liàng de wéi shēng sù. bù guò, jūn héng de yǐn shí yì bān néng gòu wán quán mǎn zú shēn tǐ duì wéi shēng sù de xū qiú. |
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