Hf

名词 hf:

1. a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
   同义词：hafnium, atomic number 72
2. 3 to 30 megahertz
   同义词：high frequency

Hf
NONE（无词性）
The symbol for the element hafnium
元素hafnium的符号