1.
hear a distant trumpet,ie its sound
听到远处的小号声.
2.
He sounded the retreat.
他吹响了撤退的号声。
3.
Listen for the dial tone and then dial the number you want.
等待拨号声，然后拨你所要的号码。
4.
so off it flew with a howl,
一声号叫飞了出去，
5.
a weak light, signal, sound
微弱的光线、 信号、 声音
6.
let out an ear-splitting yell
发出震耳欲聋的号叫声.
7.
Detection of Low Noise & Weak Signals
低噪声与弱信号检测
8.
let out a howl of laughter, agony, rage
发出狂笑、 哀号、 怒吼声
9.
Issuing a sound resembling a wail.
发出象哀号的声音的
10.
HF transistorized signal generator
晶体管高频信号发声器
11.
Explosive rocket signal for ships
GB3107.7-1991船用声响火箭信号
12.
Explosive shell signal for ships
GB3107.6-1991船用声响榴弹信号
13.
be sounded as a signal or warning
发出信号或警告的声响
14.
signal to noise and distortion ratio
信号对噪声和失真比
15.
SINAD (Signal to Noise and Distortion Ratio)
信号-噪声及失真比
16.
sound IF amplifier tube
声频信号中频放大器
17.
mouth-blown sound-signalling instrument
声响信号器,口吹的
18.
amplify the sound, electric current, signal
增强声音、 电流、 信号.