名詞 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
   同義詞：hafnium, atomic number 72
2. 3 to 30 megahertz
   同義詞：high frequency

Hf
NONE（無詞性）
The symbol for the element hafnium
元素hafnium的符號