a什么意思 a音标、翻译、用法
a音标
英 [ə]
美 [eɪ]
a翻译
art.
一（个）；每一（个）；任一（个）；
英英释义
a[ ei ]
n.a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
同义词：angstromangstrom unit
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
同义词：vitamin Aantiophthalmic factoraxerophthol
one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
同义词：deoxyadenosine monophosphate
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
同义词：adenine
the basic unit of electric current adopted under the Systeme International d'Unites
"a typical household circuit carries 15 to 50 amps"
同义词：ampereamp
the 1st letter of the Roman alphabet
同义词：letter a
the blood group whose red cells carry the A antigen
同义词：type Agroup A
a用法
双语例句
用作冠词(art.)There is a pen on the table.
桌子上有一支笔。We have a problem.
我们有个问题。I can only carry two at a time.
我一次只能带两个。Let's go to a Chinese restaurant.
我们去一家中餐餐馆。A cat is an animal.
猫是动物。
权威例句
A Brief History of Neoliberalism
Statecharts: a visual formalism for complex systems
Marching cubes: A high resolution 3D surface construction algorithm
Marching cubes: a high resolution 3D surface construction algorithm
A new technique for the assay of infectivity of human adenovirus 5 DNA.
A Gene-Expression Signature as a Predictor of Survival in Breast Cancer — NEJM
MOLMOL: a program for display and analysis of macromolecular structures.
A population genetic software for exact test and ecumenicism: GENEPOP, version 3.4
A decision-theoretic generalization of on-line learning and an application to boosting
Validation study of WOMAC: a health status instrument for measuring clinically important patient relevant outcomes to antirheumatic ...