a-

a-读音音标

英 [eɪ]

美 [eɪ‑]

a-意思解释

pref.

非；

不；

无；

没有

英英释义

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*治，但是，我认为现在他*治上比较敏锐了。