单词：Hf
[医] 铃(72号元素)
n a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
n 3 to 30 megahertz
n 3 to 30 megahertz
HF的用法和样例：
词汇搭配
- cascade hf transmission line级联高频传输线...
【近义词】
- high frequency高频
- hafnium[化]铪(金属元素...