new
a (letter in) reply to a friend的英文翻译是什么意思，词典释义与在线翻译：
英英释义
名词 a:
-
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
-
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)
-
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
-
the basic unit of electric current adopted under the Systeme International d'Unites
-
the 1st letter of the Roman alphabet
-
the blood group whose red cells carry the A antigen
