atom
英 ['ætəm]
美['ætəm]
- n. 原子
词态变化
复数: atoms;
助记提示
1、a- "not" + tom-.
2、字面含义：uncut, indivisible. => indivisible particle.
3、最初，人们认为原子就是宇宙中不可分割的最小微粒，因此就给它取名为“atom”了，当然后来证明这种认为是错误的。
2、字面含义：uncut, indivisible. => indivisible particle.
3、最初，人们认为原子就是宇宙中不可分割的最小微粒，因此就给它取名为“atom”了，当然后来证明这种认为是错误的。
中文词源
atom 原子
前缀a-, 不，非。词根tom, 切，见anatomy. 因古代哲学观念认为原子是最小的不可切分单位而得名。
英英释意
- 1. (physics and chemistry) the smallest component of an element having the chemical properties of the element
- 2. (nontechnical usage) a tiny piece of anything
英文词源
- atom
- atom: [16] Etymologically, atom means ‘not cut, indivisible’. Greek átomos ‘that which cannot be divided up any further’ was formed from the negative prefix a- ‘not’ and the base *tom- ‘cut’ (source also of English anatomy and tome), and was applied in the Middle Ages not just to the smallest imaginable particle of matter, but also to the smallest imaginable division of time; an hour contained 22,560 atoms.
Its use by classical writers on physics and philosophy, such as Democritus and Epicurus, was sustained by medieval philosophers, and the word was ready and waiting for 19th-century chemists when they came to describe and name the smallest unit of an element, composed of a nucleus surrounded by electrons.
=> anatomy, tome - atom (n.)
- late 15c., as a hypothetical indivisible body, the building block of the universe, from Latin atomus (especially in Lucretius) "indivisible particle," from Greek atomos "uncut, unhewn; indivisible," from a- "not" + tomos "a cutting," from temnein "to cut" (see tome). An ancient term of philosophical speculation (in Leucippus, Democritus), revived 1805 by British chemist John Dalton. In late classical and medieval use also a unit of time, 22,560 to the hour. Atom bomb is from 1945 as both a noun and a verb; compare atomic.
同义词辨析
molecule, atom, particle, speck, grain
这些名词均有"粒，微粒"之意。
molecule： 指物质中保持原物质的一切化学性质，能独立存在的最小微粒，即分子。
atom： 指元素的最小粒子，其体积比molecule小。
particle： 指任何物质的微粒，引申指任何小的部分。
speck： 一般指"微点"或"微粒"，可引申指"斑点、污点"。
grain： 通常指能为肉眼清楚看到的颗粒，比上述几个词所表"粒"的体积大。
实用场景例句
- the splitting of the atom
- 原子的分裂
牛津词典
- Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
- 两个氢原子和一个氧原子结合组成一个水分子。
牛津词典
- A methane molecule is composed of one carbon atom attached to four hydrogens.
- 甲烷分子由1个碳原子与4个氢原子构成。
柯林斯高阶英语词典
- The neutrons and protons form the core of the atom.
- 中子和质子构成了原子核.
《简明英汉词典》
- Alcohol: Organic compounds characterized by a hydroxyl group ( OH ) bonded to a carbon atom.
- 醇 ( 酒精 ): 是有机化合物.它是一个氢氧团和碳原子的结合.
期刊摘选
- That cannot get up an atom of sympathy for them.
- 那并不能激发起人们对他们的丝毫同情.
期刊摘选
- We hadn't an atom of food.
- 我们没有一点食物了.
《简明英汉词典》
- Matches the previous atom zero or one times, while consuming as little input as possible.
- 匹配前面的原子零次或一次, 但尽可能少地消耗输入.
期刊摘选
- It'said the implosion had the power of the atom bomb the US dropped on Nagasaki.
- 据说,此次核试验的爆炸力相当于美国在长崎投放的力量.
期刊摘选
- They exploded an atom bomb.
- 他们爆炸一颗原子弹.
辞典例句
- The particles expelled when the atom explodes are protons, alpha rays or neutrons.
- 原子爆炸时排出的粒子是质子 、 a射线或中子.
期刊摘选
- For many years the atom was believed to be indivisible.
- 在过去有很多年原子一直被认为是不可分割的.
《简明英汉词典》
- The hydrogen atom is lighter and simpler than the atoms of any other elements.
- 氢原子较之其他任何元素的原子的重量都轻,结构都简单.
期刊摘选
- It makes no sense at all to speak of a stationary electron in an atom.
- 谁要说原子内有一个静止的电子,那是毫无意义的.
辞典例句
- Methods : The atom absorbing spectrum method atom atomic fluorescence spectrometry method were used.
- 建立了荧光分光光度法测定血清中西诺沙星浓度的方法.
期刊摘选
- There is not an atom of truth in the rumor.
- 那谢意毫无真实性.
期刊摘选
- When an atom of U 235 is split, several neutrons are set free.
- 一个铀235原子分裂时, 释放出几个中子.
《简明英汉词典》
- Hydroformylation of the olefinic atom economic method th introduce new functional group in the oil compounds.
- 而通过双键的氢甲酰化反应引入新官能团能为油脂的化工利用提供了一条广阔的道路.
期刊摘选
- The positive charge in the atom is spread over the whole atomic volume.
- 原子中的正电荷分布在整个原子体积上.
辞典例句
- There's not an atom of truth in what he said.
- 他所说的没有一点是真话.
《现代英汉综合大词典》
- The nucleus of an atom consists of neutrons, protons and other particles.
- 原子核由中子 、 质子和其他粒子构成.
《简明英汉词典》
- The power of the atom can be used to produce electricity.
- 原子能可以用来发电.
《现代汉英综合大词典》
- A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.
- 一个水分子是由两个氢原子和一个氧原子构成的.
《现代英汉综合大词典》
- The power of the atom will become still better as time goes by.
- 随着时间的推移,原子动力的利用还会变得更好.
《简明英汉词典》
- He could not get up an atom of sympathy for her.
- 他对她激不出一点同情心.
《简明英汉词典》
- the splitting of the atom
- 原子的分裂
《牛津高阶英汉双解词典》
- A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
- 水分子由两个氢原子和一个氧原子构成。
《牛津高阶英汉双解词典》
- A neutron is simply a neutral particle in the nucleus of an atom.
- 中子就是原子核里不带电的粒子。
柯林斯例句
- He patented the idea that the atom could be split.
- 他获得了“原子可以再分”这一概念的专利权。
柯林斯例句