tom 原子的‘分裂◊ Two atoms 〇/ hydrogen combine with one atom of oxygen to form a molecule of
water.
原子和一个氧原子结合组成一个水分子。
atom bomb (also A-bomb) noun a bomb that explodes
using the energy that is produced when an atom or atoms are split 原子弹 atom-ic/a'tDmik; NAmE a'taimik/ adj.
[usually
before noun]
1 connected with atoms or an atom 原乎的；与原子
肴关的：atomic structure 原子结构 2 related to the energy that is produced when atoms are
split; related to weapons that use this. energy 原:子能的；，魚子武器
的：atomic energy/power 原手能/ 动力◊ the atomfc
bomb原子弹
a.tomic 'dock noun an extremely accurate
clock which uses the movement of atoms or molecules
to measure time原子钟（利用原子或分子运动计量时间，
精确度十分高>
atom.ic.ity
/,aetam_isiti/ now/? (c/7em/sfry 化）the number of atoms in
one molecule of a substance 原子'价；原
子数
a.tomic
'mass noun = relative atomic mass a.tomic 'number/iow/7 [chemistry it) the number of protons in the nucleus (= centre) of an atom, which is characteristic of a
chemical element. Elements are placed in the periodic
table according to their atomic numbers.原子序数（指原子在元素周期表中的序号> a.tomic 'spectrum noun [chemistry fc) {pi. a.tomic speetraj) a series of lines with
characteristic frequencies which
show the range of radiation that
is characteristic of a chemical element 原子光谱（显示 化学元素辐射范围的一系列有特别频率的谱线）
a.tomic
'theory noun (chemistry it, physics ^j) the theory that
all elements are made up of small particles
called atoms which are made up of a central nucleus
surrounded by moving electrons 處子论 a.tomic 'weightnown = relative atomic mass atom.ism/’aetamizam/ /?oim[u] 术语）the idea
of analysing sth by
separating it into its different parts 原子论（借助各个组成部分之间的差异等来分析整体）
—compare
holism(I) ►atom-is-tie/.aeta'mistik/
adj.
atom-ize (firf also -ise) /'aetamaiz/ verb
[VN] to reduce sth to atoms or very small pieces 使分裂成子；使粉
碎；$成微粒;使雾化
atom-izer (BrE also -isei) /'aetamaiza^)/ noun
a container that forces a liquid such as water or paint out as a very fine
spray雾化舍；喷雾器 atonal /ei'taunl; NAmE
ei'toonl/ adj. (of a piece of music 余曲)_not written in any
particuiar key 无调的 r*n?3 tonal ► aton-aNty /.eitau'naelati; NAmE
.eitou'n-/ noun [U]
atone /a'taun; NAmE a'toun/ verb [V] ~ (for sth) {format)
to act in a
way that shows you are sorry for doing sth wrong in the past 赎乂罪.弥补（过_ > HTTImake amends ： to atone /or a crime 赎罪► atone-ment now/? [U]： .to mafce atonement/or his siTis 赎他的罪过◊ Ybm Kfppur，the
Jewish day 〇> atonement 犹太教的赎罪日
Yom Kippur
jitonic/ei'tDmk; /VAmf -_ta:n-/ oc/y. 语脅).(o.f a
syllable音节）not stressed非读的；无重音的
atop /a'tDp; NAmE a'taip/
prep, {especially
on top of; at the top of 在…顶,上：a flag high atop a p〇Ze麁挂泰旗杆顶端的旗子◊ a scoop 〇/fee cream atop a sHce o/appZe pfe —弁幸果馅饼上面的一勺冰激凌
atopic/ei’topik; -_ta:p-/ 医)relating to
a form of allergy where there is a reaction in a
part of the body that does riot have direct contact with the thing causing the allergy特应性的，异位的（指过敏
部位并非直接接触过敏原）
■atorsw方/乂（in nouris 构成名词）a person or thing that
does sth做…的人（或事_) :
creator仓丨丨造者◊ percolator 咖啡渗滤器
A to Z/,ei t0 'zed; NAmE ,ei
ta 'zi:/ noun [sing.] 1 (6/-f) a book containing street maps of
all the areas of a large city屮标明各街道位置的）城市地图册2 a book containing
all the information you need about a subject