Nsa
abbr. 美国国家安全局（National Security Agency）；美国国家标准协会（National Standards Association）
🗣️ 情景例句
He is working on a book about the Vietnam War.
他正在写一本关于越战的书。
The roof has leaks in it,and the front step need to be fixed.
房顶有漏缝，并且前面台阶需要修理。
We often read in novels how a seemingly respectable person or family has some terrible secret which has been concealed from strangers for years.
在小说中，我们经常读到一个表面上受人尊重的人物或家庭，却有着某种多年不为人所知的骇人听闻的秘密。