pang小妞
The body's circulatory system (血液循环系统) includes the heart and blood vessels (血管). The heart pumps blood to all parts of the body through a network of arteries and veins (动脉和静脉).The digestive system (消化系统) breaks down (分解) and absorbs food (吸收食物) into the body. It supplies the energy that the body needs for growth and repair (生长和修复). After digestion, excess food (多余的食物) is turned into waste and eliminated from the body (被排出体外).The nervous system (神经系统) includes the brain, spinal cord (脊髓) and nerves (神经). This is your body's control system. It controls your muscles and organs, including your circulatory and digestive system.The respiratory system (呼吸系统) includes the nose and lungs. It brings air and oxygen (氧气) into the body and removes carbon dioxide (二氧化碳). The lungs are where oxygen enters the bloodstream (血流), and carbon dioxide is removed.The immune system (免疫系统) protects the body against infections (感染、传染) and diseases (疾病). Sneezing (打喷嚏) and fever (发烧) are examples of how the immune system works. If an infection invades (侵袭,侵入) the body, the immune system attacks it. The controlled use of fire (控制和使用火) allowed people to cook food and survive (幸存) in colder climates. Fire provided light so that people could work and socialize (参与社交) for longer hours. With the invention of agriculture (农业的发明), people could grow food and settle into communities (融入群体生活). By growing food, people could spend less time hunting, and more time for other things such as art.The domestication (驯养) of animals allowed people to raise and use animals for food and work. By raising herds of animals (成群的动物) such as sheep, humans had a regular supply of meat and clothing. The strength of animals such as horses and oxen was used for work and transportation (运输).The development of tools and machines has resulted in more efficient manufacturing (制造业) and construction (建筑业). With better tools and machines, work can be done with fewer people and at much lower costs.The development of science and engineering has improved many things, including communications. With an understanding of electricity, telephones and radios allow people to communicate over long distances.
北京青年123
没有这个字,只有fly这个字,意思是苍蝇。在生物学上,苍蝇属于典型的“完全变态昆虫”。70 年代末统计,全世界有双翅目的昆虫 132 个科 12 万余种,其中蝇类就有 64 科 3 万 4 千余种。主要蝇种是家蝇、市蝇等。苍蝇属双翅目,体型小型到中型,触角短于头部和胸部的总长,仅 3 节,末节末端有节鞭或末节背面有一根羽状刚毛,称触角芒(arista)。复眼2 只,单眼3 只。口器为舔吸式。前翅膜质,用来飞翔。后翅退化为平衡棒(halter),隐于前翅基部的翅瓣下。苍蝇有独特的消化道。当它们吃了带有多种病菌的食物后,能在消化道内进行快速处理,迅速摄取有营养的食物并及时将无用的糟粕、废物及病菌排出体外。这个过程需要的时间只有 7~11 秒,因而大多数细菌在进入苍蝇体内后,还来不及繁殖就已经被排出体外了。苍蝇在吃食的同时也会吃进对自己不利的细菌,因此“边吃边吐”的方法有助于迅速排除细菌。一般苍蝇从进食处理、吸收养份一直到将废物排出体外,只须 7~11 秒。遇上具有快速繁殖能力的细菌时,苍蝇的免疫系统就会发射 BF64、BD2 两种球蛋白,一旦与细菌接触,就会发生“爆炸”,与细菌“同归于尽”。这两种球蛋白的发射总是一前一后,成双成对,从不错乱。苍蝇以前翅发达,后翅退化成平衡棍的主要特征,区别于其他昆虫。头部有一对圆圆的复眼,两眼之间距离的远近是识别雌雄蝇的标志。两眼距离较远的是雌蝇,两眼距离较近的是雄蝇。头部前面有一对短小的触角,是苍蝇灵敏的嗅觉器。苍蝇为完全变态的昆虫,它的一生要经过卵、幼虫(蛆)、蛹、成虫,四个时期,各个时期的形态完全不同。雌虫将卵产于腐肉或粪便等腐败有机物上,幼虫孵化后以这些腐败物为食。某些种类的苍蝇卵胎生,例如麻蝇。体长 5~8mm,灰褐色,复眼无毛,暗红色,雄蝇额宽为眼宽的 1/4~2/5;雌蝇额宽几乎等于一侧复眼宽度。触角灰黑色,短扁,触角芒短,基部粗大,背腹两面有羽状毛,一直到达芒尖,下颗须棕黑色。口器舐吸式,外观可见到一个粗短的喙,由三部分组成,基喙呈倒锥状,中喙粗短呈筒状,端喙发达分成两瓣,即称之为唇瓣;喙可自由伸缩。中胸盾板有 4 条黑色纵条纹,前胸侧板中央凹陷处有纤毛,腋瓣上肋前、后刚毛簇均无,下侧片在后气门前下方有毛。翅透明,翅脉棕黄色,前缘脉基鳞黄白色,第四纵脉末端向前急剧弯曲成折角,其末端与第三纵脉末端靠近。足黑色,有灰黄色粉被,腹部椭圆形,黄色,在基部两侧尤明显,腹正中有宽的黑色纵条,腹部第一腹板具纤毛。苍蝇有 6 条腿(3 对),前面一对相当于人、袋鼠、猴子、熊、熊猫等等哺乳类动物的前肢和手,后面两对是支撑、发力的大腿,相当于人、袋鼠、猴子、熊、熊猫等等哺乳类动物的后肢和腿。家蝇:中小型种,体长 5~8mm,全身深灰色,雄性两复眼间距很狭,雌性两复眼间距较宽。胸背部有 4 条黑色纵纹,腹部背面基部棕黑色,端部为桔黄色,背面正中有一较宽的黑色纵纹。它是我国城镇居住区最重要的蝇种,也是进入室内最主要的蝇种。金蝇:体形较大而肥胖,体长 7~11mm,全身有蓝绿色金属光泽,雄性头部两复眼巨大,呈鲜红色,复眼下 1/3 小眼面较小,上 23 小眼面较大,呈弧形,分界明显,两复眼间距很狭;雌性两复眼间距很宽,两性颊部呈桔黄色,下腋瓣呈褐色,其上有细毛,腹基部背片全黑,是喜室外性的居住区蝇种。绿蝇:体形中至小型,体长 5~8 毫米,体色呈古铜色或青绿色,雄额狭,雌额宽,腹部除基部背片棕黑色,其余各背片后缘无黑色横带,是典型的喜室外性居住区蝇种,能侵入室内。麻蝇:中型至大型种,最长可达 13mm,为喜室外性居住区蝇种。麻蝇不以眼间距宽狭分雄雌,而要观察尾部,雄性尾部有亮黑色或红色球状膨腹端,雌性则无,而体形较肥胖,两性胸背部有三条黑色纵纹,腹部背面有黑白相间的棋盘格斑,可随光线的折光而变色,一般体型较大,也有小型。市蝇:体长 4~7mm,较家蝇稍小。体色为浅灰。亦以复眼间的距离分雌雄,雌宽,雄狭。胸背面有两条黑色纵纹;雌性在盾沟前分出一对小叉,仅为主叉的一半长。雄性两条黑纵纹不分叉,腹部深棕色,腹背面正中有黑色纵纹,两侧有银灰色小斑点,呈纵状分布。y是半元音字母,它作元音字母时,发合口双元音/aɪ/的音,由两个音组成,第一个音是前元音/a/,发音时,舌端靠近下齿,牙床比a的短音/æ/更大,全开,由第一个前元音/a/向第二个音/ɪ/滑动,舌位由低到高,口形由大到小,音量由强到弱,由长到短,由清晰到含糊,两个音合为一个合口双元音,如:sky 天空fly 飞dry 干燥spy 间谍type 打字shy 害羞的cry 哭my 我的希望我能帮助你解疑释惑。
qiuqiuFreda
有道翻译后意思是;【 pharmacology and toxicology 】 this product is a phosphate binder, and phosphoric acid in food in the digestive tract combined into is not easy to absorb calcium phosphate, reduce the absorption of phosphorus, so as to reduce the phosphorus concentration in the blood and the blood phosphorus caused by excessive secretion of parathyroid hormone. Compared with the other calcium preparations, the combination of this product and phosphorus ability and not easy to cause hypercalcemia. Taken in between meals, pharmacokinetic 】 【 calcium acetate can be combined with the food of phosphorus form insoluble phosphate, again by faeces. Patients after drug serum phosphorus levels will be less than 1.94 tendency for L (6 mg/dL). Calcium acetate in pH for 5 to neutral case still has high solubility, can rapidly release the calcium and phosphorus of the stomach and small intestine. After oral calcium preparations of acetic acid, both healthy volunteers and kidney dialysis patients, fasting cases intestinal absorption by about 40%, the fasting cases intestinal absorption of about 30%.希望可以帮到你
优质英语培训问答知识库