hf是什么意思？

hf

• abbr. half 半，hard firm 坚硬（铅笔芯），hard finish(ed) 缓硬的，hard-faced 表面硬化的；

例句

• This paper describes a series of new HF complexing liquid fluorinating agents , and there usage. 介绍了氟化氢络合液类新的氟化试剂及其用途,该类氟化剂为液态,便于储藏、输.
• The mass spectra of ferrocenyl - � � - diketonate chelates of Ti, Zr, Hf ( 1 - 6 ) and substituted ferroceoyl - titanocene complexes ( 7 - 8 ) have been inves - tigated. 本文研究了钛 、 锆 、 铪的二茂铁基β - 双酮螯合物 ( 1～6 ) 和取代的二茂铁基钛茂络合物 ( 7～8 ) 的质谱.
• The Frequency Shift Keying modulation is widely used in HF digital communication. 移频键控是短波数字通信中常用的一种调制方式.
• HF has a pungent odor. It is extremely corrosive. HF有一种刺激性气味. 它是极强的腐蚀剂.
• The biggest increase was on the cheapest model, the CRX-HF. That car had a 1990 base price of $9,145. 涨价最快的是最便宜的车型CRX-HF，那款车1990年的基价是9,145美元。
• Finally the structures were released in a 49 % HF etch. 最后在49%F中腐蚀形成这些结构.
• Reactions in liquid HF are known that illustrate also amphoteric behavior, solvolysis, or complex formation. 已知在液态HF中,也能说明两性行为溶剂分解或络合物形成作用的反应.

英英词典释义

• Noun
  1. a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons