Nsa
abbr. 美國國家安全局（National Security Agency）；美國國家標準協會（National Standards Association）
??? 情景例句
Any trouble with them?
有什么問題？
Work today, for you know not how much you may be hindered tomorrow.
今天有事今天做，明天可能事受阻。
The two men quarrelled bitterly and it was clear that the argument could only be settled by a fight.
兩個人爭吵不休，顯而易見，只有較量一番才能解決問題。