A pigeon probably has his huff duff in that incrustation above his beak . 鸽子也有它的无线电高频测向仪，也许就是它喙上部的那个硬包吧。
The high-frequency relay can be replaced by the circuit in accordance with fig. 4-10(b) . 高频继电器可以用与图4-10（b）一致的电路来代替。
The high frequencies are not emitted, the effect of frequency-selective propagation is not very apparent . 没有激发高频，频选传播不很明显。
High frequency gusts are usually measured by high response research-oriented anemometers . 高频突风通常是用高速响应的研究性定向风速计测量。
These high-frequency shout waves are only able to travel in straight paths from the transmitter . 这些高频短波从发射机发出后只能从直线传播。
High frequency instabilities result in grossly increased convective heat transfer coefficients in the chamber walls . 高频不稳定性使室壁对流传热系数大大增加。
This high frequency alternating current produces the high frequency radio waves mentioned in the previous chapter . 这种高频交流电流产生前一章提到过的高频无线电波。
It is the high-frequency components of the seismic pulse which are lost first if the basic requirement is transgressed . 如果超出了基本要求，地震脉冲的高频成分首先损耗。
There is an onset of high frequency motion which is common to both components about 1. 8 sec. after the beginning of the record . 大约在记录开始18秒后，两种分量都有高频运动出现。
