全部

1·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。

2·And you have the bond energy in HF.

你得到氟化氢的共价能。

3·And so this is the H-F bond in HF.

所以这是氟化氢中的氢氟共价键。

4·HF has a pungent odor.

HF有一种刺激性气味。

5·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。

6·Do not use oils, salves, ointments, or HF skin burn treatments.

禁止使用油、油膏、药膏或HF皮肤烧伤的处理办法。

7·The Falcon II RF-5800H is the most advanced HF radio in the world.

“猎鹰”II RF-7800H是目前最先进的高级射频无线电。

8·HF, liquid or gaseous, may cause severe burns of skin and deep tissues.

液态或气态的HF可以导致皮肤和深层组织的严重烧伤。

9·Solutions with less than 20% HF may not cause symptoms for up to 24 hours.

含有小于20%的HF的溶液不会在24小时内导致出现症状。

10·Well, if we wanted to draw that, we have HF, whoops — It looks something like that.

如果我们想画他，哎呀，它看起来有点像那个某个东西。

高频

1·The complex ray theory provides a simple and useful approach to analyze the propagation and scattering of HF EM waves in various complicated environments.

复射线理论为高频电磁波在各种复杂环境中的传播和散射提供了一种简便而有效的分析方法。

2·The performance of HF data transmission systems is badly constrained by the HF channels what are characterized by the rapid time variation and dispersion.

高频信道的变参性以及时间弥散特性严重影响短波数据传输的性能。

3·In this paper, we devise an experiment, using HF surface wave discharge to excite plasma, to analyze basic characteristics of plasma antenna elements.

本文设计了一种实验方案，用高频表面波放电来激发等离子体，并分析了等离子体天线元的基本特性。

4·The principle and structure of power supply and HF arc ignition circuit is analyzed in detail.

详细分析了电源系统和高频引弧电路的结构组成和工作原理。

5·An experiment circuit to simulate primary voltage of HF switching transformer is put forward.

还提出了模拟高频开关变压器初级电压的实验电路。

氟化氢

1·It is possible that Kr and Ar could also act as Lewis bases, but evidently they cannot compete with HF.

很可能氪和氩也可以做路易斯碱，但显然它们不能和氟化氢竞争。

2·The paper introduces the technology of preparing canister to eliminate HF, and discusses treatment methods, treatment technics and treatment medicament all around.

论述了除氟化氢用滤毒罐的制备的工艺研究，并从处理方法、处理工艺和处理药剂等方面进行了较全面地介绍。

3·Recent years, the harm of acid rain is growing, mainly due to the increase of SO2, HF and other toxic gases of the air.

近年来，大气酸雨问题日益严重，造成酸雨的主要原因是大气中二氧化硫、氟化氢等有毒气体含量的增加。