abbr. half 半;hard firm 坚硬(铅笔芯);hard finish(ed) 缓硬的;hard-faced 表面硬化的
网络 氢氟酸(Hydrogen fluoride); 高频(high frequency); 氟化氢
The first hyperpolarizability is studied at HF/6-31G level by coupled perturbed Hartree-Fock (CPHF) method.
采用耦合微扰(CPHF)方法在 HF/6-31G 水平上对巴比妥酸衍生物的第一超极化率进行了计算。
And you have the bond energy in HF.
你得到氟化氢的共价能。
And so this is the H-F bond in HF.
所以这是氟化氢中的氢氟共价键。
HF has a pungent odor.
HF有一种刺激性气味。
And, so, what that tells us is HF is polar.
所以这个答案告诉我们HF是极性的。