a-
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pref.
非；不；无；没有
英英释义
a-[ ə ]
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 unitA
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 factoraxerophtholA
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 monophosphateA
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
同义词：adenineA
the basic unit of electric current adopted under the Systeme International d'Unites
同义词：ampereampA
the 1st letter of the Roman alphabet
同义词：Aletter a
the blood group whose red cells carry the A antigen
同义词：Atype Agroup A
双语例句
Guy was greedy, amoral and dishonest.
盖伊贪心、不讲道德、又不诚实。
Henry used to be totally apolitical,but I think he is now politically more aware.
基辛格过去完全不问政治，但是，我认为现在他政治上比较敏锐了。
权威例句
The CES-D Scale: A Self-Report Depression Scale for Research in the General PopulationVery Deep Convolutional Networks for Large-Scale Image Recognition
A decision-theoretic generalization of on-line learning and an application to boosting
Prevention of coronary and stroke events with atorvastatin in hypertensive patients who have average or lower-than-average cholester...
Refinement of Macromolecular Structures by the Maximum-Likelihood Method
Profiling of complex microbial populations by denaturing gradient gel electrophoresis analysis of polymerase chain reaction-amplifie...
32 – Rapid and Efficient Site-Specific Mutagenesis without Phenotypic Selection
Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations
Measurement of Protein Using Bicinchoninic Acid,Anal. Biochem. 150, 76-85
Collaborative meta-analysis of randomised trials of antiplatelet therapy for prevention of death, myocardial infarction, and stroke ...
1. They had a butler, a cook, and a maid.
他们有一位管家、一位厨师和一位女仆。
《柯林斯英汉双解大词典》
2. "Ha!" It was a cross between a laugh and a bark.
“哈！”那是一种一半是笑一半是厉声喊叫的混杂声。
《柯林斯英汉双解大词典》
3. She's a singer with a band.
她是一个乐队的歌手。
《牛津词典》
4. A gang taunted a disabled man.
一帮混混儿羞辱了一个残疾人。
《柯林斯英汉双解大词典》
5. For a year I dated a woman who was a research assistant.
有一年的时间，我一直和一个女助理研究员约会。
《柯林斯英汉双解大词典》
6. Nothing gives a room a faster facelift than a coat of paint.
没有什么比一层油漆能更快地使房间面貌一新。
《柯林斯英汉双解大词典》
7. A schoolgirl rushed into a burning apartment to save a man's life.
一名女学童冲进一栋着火的公寓去救一个男子的命。
《柯林斯英汉双解大词典》
8. He's a nice old rascal but a disaster area as a politician.
他是个不错的老家伙，但作为一个政治家却糟透了。
《柯林斯英汉双解大词典》
9. He's a scoundrel! A cad!
他是个恶棍！一个卑鄙的无赖！
《柯林斯英汉双解大词典》
10. A second-hand car costs a fraction of a new one.
二手车的花费只是新车的零头。
《牛津词典》
11. He's a nut, a real character.
他是个怪人，一个真正与众不同的人。
《柯林斯英汉双解大词典》
12. A cube is a solid figure.
立方体是一种立体图形。
《牛津词典》
13. He was a ladies' man. A cheater. A player.
他曾是个花花公子，一个骗子，一个四处寻欢作乐的浪子。
《柯林斯英汉双解大词典》
14. A man in a crash helmet was mounting a motorcycle.
一个戴着防撞头盔的男子正骑上一辆摩托车。
《柯林斯英汉双解大词典》
15. A vandal with a chainsaw cut down a tree.
一个蓄意破坏公物者用链锯锯倒了一棵树。
《柯林斯英汉双解大词典》
16. She's a phony, a fake.
她是个伪君子、骗子。
《柯林斯英汉双解大词典》
17. A Mercedes carries a certain cachet.
奔驰汽车久负盛名。
《柯林斯英汉双解大词典》
18. A lion is a dangerous animal.
狮子是猛兽。
《牛津词典》
19. I swim a mile a day.
我每天游一英里。
《柯林斯英汉双解大词典》
20. He's a man with a grudge.
他是一个心怀怨恨的人。
《牛津词典》
21. It's a bastard of a problem.
那是个挺麻烦的问题。
《牛津词典》
22. As a teacher, he's a disaster.
他当老师压根儿就不称职。
《牛津词典》
23. He's a fraud and a cheat.
他是一个骗子。
《柯林斯英汉双解大词典》
24. A girl was killed yesterday in a crash involving a stolen car.
昨天有一女孩在一桩涉及窃车的撞车事故中丧生。
《牛津词典》
25. That was a conjecture, not a fact.
那是个推测，不是事实。
《柯林斯英汉双解大词典》
26. A mule is a cross between a horse and a donkey.
骡是马和驴杂交的产物。
《牛津词典》
27. What a nice dog—is it a he or a she?
多好的狗—它是公的还是母的？
《牛津词典》
28. The play was a cross between a farce and a tragedy.
这出戏把闹剧和悲剧交织为一体。
《牛津词典》
29. He's a retired lieutenant colonel and a bit of a martinet.
他是位退役中校，有点一板一眼。
《柯林斯英汉双解大词典》
30. He's a retired lieutenant colonel and a bit of a martinet.
他是位退役中校，有点一板一眼。
《柯林斯英汉双解大词典》
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