public address是什么意思 public address怎么读
public address的英文翻译是什么意思，词典释义与在线翻译
public address的用法和样例
- This kind of public address alert, recorded at the Tokyo University, will automatically be triggered at certain locations seconds before a big tremor is felt.
这种由播音报警系统，由东京大学记录，将在人体感觉到大震动前几秒对某些定点发布。
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