n a radioactive transuranic element produced by bombarding plutonium with neutrons
n a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
n a radioactive transuranic element produced by bombarding plutonium with neutrons
n the cardinal compass point that is at 90 degrees
n the base of the natural system of logarithms; approximately equal to 2.718282...
n the 5th letter of the Roman alphabet
[化] 电子能谱; 电子能谱学; 专家系统
[医] 低于模糊意识(低于下意识)