| 单词 | public address system |
| 释义 | public address systemBrE /ˌpʌblɪk əˈdres sɪstəm/ NAmE /ˌpʌblɪk əˈdres sɪstəm/ noun (abbreviation PA system , PA ) an electronic system that uses microphones and loudspeakers to make music , voices , etc . louder so that they can be heard by everyone in a particular place or building 广播系统 |
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