U.

汉语翻译

【医】 单位

英语解释

名词 u.:

a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine同义词：uracil, Ua heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons同义词：uranium, U, atomic number 92the 21st letter of the Roman alphabet同义词：U, letter u

形容词 u.:

(chiefly British) of or appropriate to the upper classes especially in language use同义词：u