A
- n. 英语字母表的第1个字母；A音；A类；干线公路；最高收入群体；第一列；第一已知量；表层土壤；A型血；A型号纸；A字形
- abbr. 安培（ampere）；A纸牌（ace）；……比……（against）
网络释义专业释义英英释义
a cappella 无伴奏合唱 ; 阿卡贝拉 ; 无伴奏
A little 一点 ; 一些 ; 一点儿 ; 一点点
hypervitaminosis a 维生素A过多症
a rabbit 一只兔子
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1a 级(城市或公司债券的等级，低于 2a 级，高于 3b 级)
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a 型血腺嘌呤(adenine)的符号；丙氨酸(alanine)的符号腺苷 (adenosine)极光激酶A (aurora)
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通风巷道,风道
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(原子)质量数(= mass number)埃(angstrom),埃单位(angstrom unit)的符号;亥姆霍兹函数(helmholtz function)的符号
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安 (ampere;amp)
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安培 (ampere;amp)A磁碟机
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丙胺酸 (alanine;ala)丙氨酸 (alanine;ala)
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钾霞橄黄长岩
·2,447,543篇论文数据，部分数据来源于NoteExpress
A [ ei ]
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n.
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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： angstrom angstrom unit
- any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
- one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
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(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
同义词： adenine
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the basic unit of electric current adopted under the Systeme International d'Unites
"a typical household circuit carries 15 to 50 amps"
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the 1st letter of the Roman alphabet
同义词： letter a
- the blood group whose red cells carry the A antigen
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a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
以上来源于: WordNet
柯林斯英汉双解大词典
A /ə/ (also a)
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1.
N-VAR A is the first letter of the English alphabet. 英语字母表中第1个字母
双语例句原声例句权威例句
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About the size of a small dog, echidnas look like a mixture of a porcupine, an anteater,a pig and a mole.
VOA: special.2009.07.07
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It's a ladder used to ascend a tree, it's a kind of tool of ascent that's a kind of a tool for getting fruit.
这是用来爬上树的梯子，是一种上升的工具,也是用来摘果子的。
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Censorship only comes into play once a text has actually been in circulation for a while, only after a number of readers have found a published text to pose a threat.
控制仅仅是一本书已经出版发行一段时间,一些读者已经发现这印刷的文本,造成威胁时才起作用的。
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