升学规划 · 弘扬国学 · 传承文化 · 职业规划

怀抱教育相关平台志愿填报　文库文章　单招培训　考研升学

a英英释意_发音_a同义词辨析_a词组搭配_a实用场景例句

首页英语词典aa英英释意

a

英[ə;eɪ] 美[e]

英英释义实用场景例句

n. 字母A；第一流的；学业成绩达最高标准的评价符号
abbr. [物]安（ampere）

英英释意

1. the blood group whose red cells carry the A antigen

2. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

3. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

4. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

5. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

6. the basic unit of electric current adopted under the Systeme International d'Unites;: "a typical household circuit carries 15 to 50 amps"

7. the 1st letter of the Roman alphabet