U

U读音音标

[ju:]

U意思解释

n.

英语字母表的第21个字母；

英英释义

n.

a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine

同义词：uracil

a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons

同义词：uraniumatomic number 92

the 21st letter of the Roman alphabet

同义词：letter u

adj.

(chiefly British) of or appropriate to the upper classes especially in language use

词组短语

u turn