Pa system

[電] Public-AddressSystem的簡寫

?? 詞語組成解析

PA [[pɑ:]]
私人秘書, (露天)擴音系統\\n[計] 程序存取, 程序地址, 程序分析
system ['s?st?m]
n. 體系，系統;制度;身體;方法;
sy(syn-=together)+ste(to stand)→系統；體系；秩序；制度；方法

??? 情景例句

Morning, Marilyn.
早安， Marilyn。
Progress is the activity of today and the assurance of tomorrow.
進展即今日的活動和明日的保證。
Knowledge began to increase as soon as the thoughts of one individual could be communicated to another by means of speech.
人一旦能用語言同別人交流思想，知識的積累便開始了。
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