| 释义 |
u 1/U 英juː美juAHDy›
英英近义反义
Noun:
a base containing nitrogen that is found in RNA but not in DNA and derived from pyrimidine; pairs with adeninea heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weaponsthe 21st letter of the Roman alphabet
Adjective:
chiefly British of or appropriate to the upper classes especially in language use近义词 uranium铀uracil化尿嘧啶 |