Aac
abbr. 自动振幅控制（automatic ampltiude control）
🗣️ 情景例句
Good morning, Mom.
早安 ，妈妈。
My brother took lessons on the trumpet for nearly ten years.
我的兄弟有将近10年的时间听小号的课了。
The truth is that when mistakes occur, they are more likely to be ours than theirs.
事实上，差错很可能是我们自己，而不是铁路当局的。