A new, unseen voice was booming through the pa system . 一个新的，看不见的声音从扩音机里嗡嗡地传来。
2.
What are the chances that i will blow one of my stereo speakers if i turn my 200-watt amplifier up to wide open ? 如果把200瓦的扩音机开到最大，立体声喇叭烧坏的可能性有多大？
3.
She gave up talking as she saw bette was trying to listen to the speech that was being relayed through a loud-speaker tied to one of the trees . 系在一棵树上的扩音机里传过来人家的演讲，她看见蓓蒂要听就不说话了。
4.
Ten minutes later sutherland grabbed a microphone 十分钟后，萨瑟兰抓住扩音机话筒。
5.
Measuring methods of car radio cassette player and audio amplifier 汽车收放扩音机测量方法
6.
Classification and basic parameter of car radio casstte player and audio amplifier 汽车收放扩音机分类与基本参数
7.
During lunch , guests and fellow initiates sat in the shade enjoying their buddha meal . before long , loudspeakers broadcast a message that master had just phoned to say hello . exultant as we were , we were equally able to appreciate the longing feeling we had all experienced in missing each other 午餐时，同修与来宾闲坐凉荫一起享受佛饭，不一会儿，扩音机传来师父打电话回来向大家问好之消息，大家在高兴之馀，也深深体会师徒相思之苦。
8.
The baha is anchored to the skull by a tiny titanium screw . instead of sounds entering the outer ear canal and impinging on the eardrum as in normal hearing , the sounds amplified by the device are conducted through the screw and the bones of the skull to the cochlea , the snail - shaped inner ear structure responsible for converting sounds into electrical signals carried to the brain by the auditory nerve 骨固定式助听器利用钛金属螺丝固定在耳后方的头骨，助听器扩音机放大的声音经由钛金属螺丝及头骨直接传到耳蜗，不像传统空气传导式助听器般，声音要经过外耳道，再透过鼓膜传音传至耳蜗。
